64 results on '"Kamate B"'
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2. PRISE EN CHARGE DE L'EXSTROPHIE VESICALE DANS LE SERVICE DE CHIRURGIE PEDIATRIQUE : CHU GABRIEL TOURE.
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Amadou, I., Coulibaly, Y. M., Coulibaly, O. M., Konaté, D., Coulibaly, Y., Coulibaly, M. T., Maiga, B., Doumbia, A., Traoré, F., Karembé, B., Djire, M. K., Kamate, B., Daou, M. B., Barry, A., Cissé, M. E., Coulibaly, O., and Dembélé, A.
- Abstract
Copyright of Mali Médical is the property of Mali Medical, Faculte de Medecine, de Pharmacie et d'Odonto-stomatologie and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2023
3. Ponction biopsie pleurale dans le diagnostic étiologique des pleurésies
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Toloba, Y., Diallo, S., Sissoko, B.-F., Kamaté, B., Ouattara, K., Soumaré, D., and Keïta, B.
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- 2011
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4. Etude clinique, endoscopique, anatomopathologique et pronostique des cancers de l’estomac en milieu rural
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Diarra, M., Diarra, A., Dolo, M., Kamate, B., and D’horpock, A. F.
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- 2005
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5. Biomarqueur tumoral ca15-3 dans les cancers du sein au laboratoire de l’hôpital du Mali : A propos de 30 cas
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Drame, B.S.I., Kone, A.S., Ouattara, M.A., Ouattara, H., Diallo, Y.L., Diakite, A., Coulibaly, DM, and Kamate, B.
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cancer du sein, CA15-3, histologie - Abstract
Objectif : étudier les variations du taux plasmatique du marqueur tumoral CA15-3 dans le cancer du sein, chez les patientes prélevées au laboratoire de l’hôpital du Mali.Malades et méthodes : Il s’agissait d’une étude prospective du taux sérique du CA15.3 chez les patientes admises pour un cancer du sein à l’hôpital du Mali, de janvier à octobre 2017. Trente (30) patientes ont été colligées. Les paramètres étudiés étaient le type histologique et le grade Scarf Bloom et Richardson (SBR), le taux sérique du CA 15.3. La concentration moyenne du CA 15-3 a été comparée, aux variables clinique et anatomopathologique.Résultats : L’âge moyen était de 47.3±11.4 ans. Les patientes étaient ménopausées dans 53% des cas, 3% avaient des antécédents familiaux de cancer du sein. En fonction du stade de la maladie à l’admission, le taux moyen du CA 15-3 était plus élevé au moment du diagnostic (58.47 UI/ml) qu’après le traitement (43.6 UI/ml) et plus faible au moment du suivi (38.76 UI/ml) p
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- 2019
6. Claudius Amyand's Hernia a Rare Cause of Acute Scrotum a Case Report
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Coulibaly Om Amadou I, Coulibaly Y Diaby S, Kone I Traore M, Kamate B Malle K, Kone D Dembele B, Coulibaly Mb Diouf C, Kone J Coulibaly Y, and Dao M Keita M
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medicine.medical_specialty ,business.industry ,General surgery ,medicine ,Acute scrotum ,General Medicine ,medicine.disease ,business ,Amyand's hernia - Published
- 2020
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7. Claudius Amyand's Hernia a Rare Cause of Acute Scrotum a Case Report
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Diouf C, Coulibaly MB, primary, Diaby S, Coulibaly Y, additional, Amadou I, Coulibaly OM, additional, Malle K, Kamate B, additional, Coulibaly Y, Kone J, additional, Traore M, Kone I, additional, Dembele B, Kone D, additional, and Keita M, Dao M, additional
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- 2020
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8. Cryptococcose extra-neuroméningée au cours du sida à Bamako, Mali (à propos de 2 observations)
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Minta, D.K., Traoré, A.M., Coulibaly, I., Diallo, K., Soukho-Kaya, A., Dolo, A., Kamaté, B., Ouologuem, D.S., Dembélé, M., Traoré, H.A., Chabasse, D., and Pichard, E.
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- 2014
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9. Surgical complications of Pica syndrome: About 3 cases
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Coulibaly Yacaria, Doumbia Aliou Aliou, Amadou Issa, Keita Mamby, Coulibaly Oumar, Kamaté Benoi, Djiré Mamadou Kassim, Coulibaly Youssouf, Camara Sadio, and Diallo G
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pica syndrome ,digestive ,complication ,child ,Pediatrics ,RJ1-570 - Abstract
The Pica syndrome is an eating disorder characterized by an excessive or abnormal desire to consume a non-nourishing substance which can be relatively harmless, or potentially harmful for the health. It is a rare affection secondary to the accumulation of diverse natured foreign bodies inside the digestive tract and more especially at the stomach level. Gastro-intestinal localization is the most frequent, and can remain asymptomatic for a long time. Treatment is surgical. We report 3 cases of digestive complications of Pica syndrome.
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- 2020
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10. Early reoperation in pediatric surgery at the Teaching Hospital Gabriel Touré.
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Coulibaly Yacaria, Amadou Issa, Doumbia Aliou, Coulibaly Oumar, Kamate Benoît, Djiré Mamadou Kassoum, Coulibaly Mamadou Bernard, and Diaby Souleymane
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early ,reintervention ,risk factors ,child ,mali ,bamako ,Pediatrics ,RJ1-570 - Abstract
Introduction: To identify complications requiring early reoperation and to determine associated risk factors in the pediatric surgery of the teaching hospital Gabriel Toure. Materials and Methods: A retrospective study of children 0-15 years old during 4 years (January 2014 to December 2017) presenting with a postoperative complication requiring a reoperation and taken care of during the period of study. Observation of bowels or the liquid stools through the opened wound, the presence of air-fluid levels on an abdominal plain X-ray and the absence of resumption of intestinal transit allowed us to make a decision to re-operate. Results: We have re-intervened on 103 patients because of early postoperative complication out of 4730 cases of pediatric surgery carried out in this hospital during these 4 years. This represented 1.54 % of our total surgical activities. The average age of our patients was a 5.2±2.3 year ranging from 2 months to 15 years. The sex ratio was 0.94. Eighty four (81.55 %) of our patients were admitted and operated on emergently. Peritonitis due to digestive system perforation represented 45.28 % of the indications for reoperation followed by the acute intestinal intussusceptions (10.7 %) and traumatic eviscerations (9.7 %). The average duration before the first intervention was 80±13.6mn. The postoperative evisceration was the 1st cause of reoperation followed by the post-operative peritonitis and then post-operative intestinal obstruction. The average time to reoperation was 6.9 ± 4.2 days. Conclusion: In our hospital risk of reoperation has an association with: indication of first surgery, operating technique, experience of the surgeon, malnutrition and anemia (p 0.05).
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- 2019
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11. L'AMYLOSE COLIQUE SECONDAIRE A LA TUBERCULOSE : A PROPOS D'UNE OBSERVATION ET REVUE DE LA LITTERATURE.
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Malle, B., Kamate, B., Coulibaly, B., Traore, C. B., Sangare, B. B., Keita, M., Coulibaly, S. A., and Bayo, S.
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MEDICAL literature , *TUBERCULOSIS , *AMYLOIDOSIS diagnosis , *INTERNAL medicine , *EDEMA , *DIARRHEA , *ABDOMINAL pain - Abstract
The authors report the first case of amyloidosis diagnosed by histology and documented in Mali. The patient was a young lady of 31years old, hospitalized in internal medicine at the University Hospital of "Point G" for edema and ascites syndrome. She had a history of diarrhea, fever, vomiting, exercise dyspnea and diffused abdominal pain. The biological assessment such as HIV serology was normal. The research of Mycobacterium tuberculosis in sputum was positive. The diagnosis hypothesis of amyloidosis has been evoked. A biopsy of the rectal mucosa has been done. The histology has showed an acellular band between basement membrane and the periglandular area. This band was stained in red by Rouge Congo. That confirmed the diagnosis of amyloidosis. [ABSTRACT FROM AUTHOR]
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- 2013
12. Can we improve the diagnosis of invasion in encapsulated follicular-patterned thyroid tumors? Data from a massive international e-learning initiative.
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Mansour Y, Chaltiel L, Cavillon A, Al Bouzidi A, Kamate B, De Leo A, Ramiandrasoa AL, Mrad K, Vibert N, Sobrinho-Simoes M, Tallini G, Vielh P, and Belleannée G
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With the reclassification of non-invasive follicular variant of papillary thyroid carcinoma as "tumors" (NIFTP), the challenge of diagnosing carcinoma lies in recognizing invasion: blood vessel invasion (BVI) or capsular invasion (CI). We aimed to assess reproducibility in diagnosing BVI and CI in follicular-patterned tumors using a web-platform, under conditions as close as possible to routine surgical pathology practice. Six-hundred-fourteen pathologists reviewed 69 thyroid lesions diagnostically challenging for BVI or CI, made available in three rounds: before, immediately after, and three months after a training lecture given by an expert pathologist. Each lesion was associated with a quiz (five queries: certain CI, doubtful CI, certain BVI, doubtful BVI, or no invasion). Intraobserver agreement was fair for five queries and moderate for two categories (i.e., BVI vs. the other four queries). Interobserver overall agreement (OA) of participants was fair for all five queries and moderate for two categories (OA for five queries: 0 at each round; OA [95% CI] for two categories: Round 1 to 3: 8.7 [3.3-18.0], 2.9 [0.4-10.1], 4.3 [0.9-12.2]). Importantly, participants agreement with expert consensus improved following the training lecture and was maintained for three months (OA for five queries: Round 1 to 3: 40.6 [13.0-62.3], 49.3 [21.7-69.6], 49.3 [21.7-78.3]; OA for two categories: Round 1 to 3: 72.5 [60.9-89.9], 76.8 [62.3-88.4], 75.4 [60.9-89.9]). This study reveals the difficulty of applying clearly defined BVI and CI criteria to routine practice, but a specifically designed training lecture improves diagnostic accuracy, and the improvement is retained over months., Competing Interests: Declarations. Conflict of interest: The authors declare no competing interests. Ethics approval and consent to participate: The teaching cases selected for the study were anonymized. Ethics review board was waived., (© 2025. The Author(s).)
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- 2025
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13. Self-Perceived Barriers to Pediatric Cancer Care in Sub-Saharan Africa: A Cross-Sectional Multinational Study.
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Stoeter O, Mezger NCS, Koenig T, Chokunonga E, Tessema G, Damise AF, Makouanzi AS, Majaliwa E, Ivanga M, Kamate B, Gnahatin F, Nambooze S, Ekanem IA, Bernig T, Liu B, Gupta S, and Kantelhardt EJ
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- Humans, Cross-Sectional Studies, Male, Africa South of the Sahara epidemiology, Female, Child, Adolescent, Child, Preschool, Infant, Young Adult, Infant, Newborn, Surveys and Questionnaires, Self Concept, Neoplasms therapy, Neoplasms psychology, Health Services Accessibility statistics & numerical data
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Purpose: The number of patients with childhood cancer (CC) in sub-Saharan Africa is expected to rise over the coming years. According to the WHO Initiative for Childhood Cancer, access to care is crucial and must be guided by the needs of patients and their families. Our study explored barriers to CC treatment from a patient's perspective to guide the health care providers., Methods: From February to September 2021, we conducted a multinational cross-sectional study with a sample from nine population-based cancer registries in nine sub-Saharan countries. Inclusion criteria comprised a cancer diagnosis according to the International Classification of Childhood Cancer, age 0-19 years, and year of diagnosis 2017-2019. A questionnaire was administered asking families about self-perceived barriers accessing surgery, radiotherapy, and chemotherapy. To assess associated factors, we conducted a multivariable regression analysis presenting the results as odds ratios (ORs)., Results: A total of 224 patients with CC was included. The fear of treatment effects and the perceived (poor) health of the child were named most frequently as barriers for all treatment modalities (78.9% and 75.5%, respectively). For chemotherapy, respondents who indicated themselves as rich had lower odds of perceiving the (poor) health of the child as a barrier (OR, 0.06 [95% CI, 0.01 to 0.36]). For radiotherapy, long waiting time and (limited) availability in the country were more commonly barriers (OR, 7.53 [95% CI, 3.38 to 16.78]; OR, 11.11 [95% CI, 2.04 to 60.46], respectively) than for chemotherapy., Conclusion: Despite known barriers such as the availability of therapy, our study additionally indicates the importance of the patients' and families' perceptions of the disease and its treatment. Further expanding measures of social support for affected families should be regarded as one of the main pillars to assure access to care.
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- 2025
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14. Population impact of malaria control interventions in the health district of Kati, Mali.
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Katile A, Sagara I, Cissoko M, Bationo CS, Dolo M, Dembélé P, Kamate B, Simaga I, Sissoko MS, Landier J, and Gaudart J
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- Humans, Mali epidemiology, Female, Incidence, Pregnancy, Mosquito Control methods, Child, Seasons, Malaria prevention & control, Malaria epidemiology, Insecticide-Treated Bednets statistics & numerical data
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Background: WHO and its partners have adopted alternative control interventions since the failure to eradicate malaria worldwide in the 1960s and 1970s. The aim of these interventions has been to redesign the control interventions to make them more effective and more efficient. The purpose of this study is to assess the population impact of control interventions implemented at the community health area level., Methods: The analysis used data from the health information system on malaria cases and interventions (distribution of long-lasting insecticide-treated nets (LLINs), seasonal malaria chemoprevention (SMC), access to rapid diagnostic tests (RDT), intermittent preventive treatment for pregnant women (IPTp)) collected in the Kati health district from 2017 to 2020. And the contextual parameters (temperature, normal difference vegetation index (NDVI) and rainfall) were obtained by remote sensing. A generalized additive model was used to assess the impact of malaria control interventions on malaria cases as a function of meteorological factors., Results: The incidence of malaria varies from year to year and from health area to health area, as do meteorological factors in the study area. The distribution of long-lasting insecticide-treated nets, chemoprevention of seasonal malaria in children and access to rapid diagnostic tests for malaria were found to have a significant impact on the incidence of malaria in the population. Seasonal malaria chemoprevention was effective in reducing the incidence of malaria, while distribution of long-lasting insecticide-treated nets and access to rapid diagnostic tests increased with the number of malaria cases, reflecting efforts to distribute and use bed nets and to diagnose malaria cases among the population in the study area., Conclusion: The study showed the impact of SMC on reducing malaria cases in the population and the significant efforts in LLIN distribution and malaria case diagnosis. To further reduce the burden of malaria, sustained efforts and new interventions are needed, including improving access to rapid diagnosis and treatment in communities by developing community health workers and locally tailored mass drug administration., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Katile et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2024
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15. Understanding Integrated Community Case Management Institutionalization Processes Within National Health Systems in Malawi, Mali, and Rwanda: A Qualitative Study.
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Davis AL, Felker-Kantor E, Ahmed J, Jezman Z, Kamate B, Munthali J, Umulisa N, and Yattara O
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- Humans, Malawi, Rwanda, Mali, Community Health Workers organization & administration, Community Health Services organization & administration, Child, Preschool, Child Health Services organization & administration, Malaria, National Health Programs organization & administration, Delivery of Health Care, Integrated organization & administration, Leadership, Qualitative Research, Case Management organization & administration
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Introduction: Since 2012, the World Health Organization (WHO) and UNICEF have recommended integrated Community Case Management (iCCM) of childhood illnesses as an intervention delivered by community health workers (CHWs) in areas with limited access to health facilities to increase access to lifesaving interventions for children younger than 5 years with malaria, pneumonia, or diarrhea. In recent years, the importance of institutionalizing iCCM and community health more broadly within national health systems has become increasingly recognized., Methods: This qualitative study sought to identify and describe processes of iCCM institutionalization from the perspectives of health system actors. A total of 51 semistructured interviews were conducted with purposefully selected key informants in 3 countries: Malawi, Mali, and Rwanda. Thematic analysis of coded interview data was conducted, and country documentation was reviewed to provide contextual background for qualitative interpretation. The study was informed by a newly developed iCCM Institutionalization Framework, which conceptualizes the process of institutionalization through a maturity model of phases (i.e., awareness, experimentation, expansion, consolidation, and maturity) with 4 drivers: core values, leadership, resources, and policy., Results: According to key informant narrative descriptions, processes of iCCM institutionalization reflected a progression of maturity phases, which were iterative rather than linear in progression. All 4 drivers of institutionalization as conceptualized within the iCCM Institutionalization Framework were described by key informants as contributing to the advancement of iCCM institutionalization within their countries. Key informants emphasized the need to continually strengthen or reinforce iCCM institutionalization for it to be sustained within the context of wider health system dynamics., Conclusion: Overall, key informants viewed government ownership and integration within national systems to define the status of iCCM institutionalization. Further development of the iCCM Institutionalization Framework and other practical sensemaking models could assist health system actors in advancing institutionalization of iCCM and other health interventions., (© Davis et al.)
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- 2024
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16. Distribution of High-Risk Human Papillomavirus in Self-Collected Cervicalvaginal Samples from the General Malian Population.
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Kamate B, Kassogue Y, Diakite B, Traore B, Cisse K, Diarra F, Kassogue O, Diarra M, Coulibaly A, Coulibaly B, Maiga A, Ly M, Diallo H, Sissoko SB, Sissoko AS, Traore CB, Teguete I, Bah S, Dolo G, Gursel DB, Holl J, Hou L, and Maiga M
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Cervical cancer (CC) remains a real public health problem in low- and middle-income countries, where technical resources and competent personnel are insufficient. Persistent cervix infection by high-risk human papillomavirus (Hr-HPV) is the main cause of CC development. In the current study, we examined the distribution of Hr-HPV in the general healthy Malian population using cervicovaginal self- sampling. A total of 354 women were recruited, with a median age of 34 ± 11.37 years, IQR (27-43). We found that 100% of participants agreed to self-sample at the health center. For result announcement 99.2% expressed their preference to be contacted by cell phone. Furthermore, 100% of study participants showed their willingness to undergo confirmatory CC test in case of Hr-HPV test proved positive, and to receive treatment in the event of the presence of cervical lesions. The overall prevalence of Hr-HPV was 21.2% (95% CI: 17-25.8). HPV31/35/33/52/58 with 11.9% (95% CI: 8.7-15.7) and HPV39/68/56/66 with 5.9% (95% CI: 3.7-8.9) were the most common Hr-HPV subtypes. We noted that Hr-HPV genotypes were more prevalent among women under 25 years, 36.1% (N = 61). In addition, the distribution of Hr-HPV was statistically associated with age, W = 12,374, p = 0.015. Our data showed that 25.3% (N = 19) of Hr-HPV-positive women were tested positive by VIA/VILI. Among the 19 VIA/VILI-positive women, histological examination showed that 4 were CIN1, 4 were CIN2, and 2 were CIN3 grades. In addition, the median age of participants with CIN2 and CIN3 was statistically higher than the median of those with CIN1 grade, 25 years IQR (21-26.75) versus 50 years, IQR (40.25-55), W = 24, p = 0.009. In sum, end-users are very satisfied with the cervicovaginal self-sampling device for identifying HR-HPV genotypes as part of CC screening. In addition, it enables hospital practitioners to take the necessary action after triaging women according to their HR-HPV genotype., Competing Interests: Declarations. Conflict of interest: The authors have not disclosed any competing interests., (© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2024
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17. Documenting Community Health Worker Compensation Schemes and Their Perceived Effectiveness in Seven sub-Saharan African Countries: A Qualitative Study.
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Davis AL, Flomen L, Ahmed J, Arouna DM, Asiedu A, Badamassi MB, Badolo O, Bonkoungou M, Franco C, Jezman Z, Kalota V, Kamate B, Koko D, Munthali J, Ntumy R, Sichalwe P, and Yattara O
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- Humans, Africa South of the Sahara, Workers' Compensation, Salaries and Fringe Benefits, Documentation, Motivation, Community Health Workers, Qualitative Research
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Introduction: Community health worker (CHW) incentives and remuneration are core issues affecting the performance of CHWs and health programs. There is limited documentation on the implementation details of CHW financial compensation schemes used in sub-Saharan African countries, including their mechanisms of delivery and effectiveness. We aimed to document CHW financial compensation schemes and understand CHW, government, and other stakeholder perceptions of their effectiveness., Methods: A total of 68 semistructured interviews were conducted with a range of purposefully selected key informants in 7 countries: Benin, Burkina Faso, Ghana, Malawi, Mali, Niger, and Zambia. Thematic analysis of coded interview data was conducted, and relevant country documentation was reviewed, including any documents referenced by key informants, to provide contextual background for qualitative interpretation., Results: Key informants described compensation schemes as effective when payments are regular, distributions are consistent, and amounts are sufficient to support health worker performance and continuity of service delivery. CHW compensation schemes associated with an employed worker status and government payroll mechanisms were most often perceived as effective by stakeholders. Compensation schemes associated with a volunteer status were found to vary widely in their delivery mechanisms (e.g., cash or mobile phone distribution) and were perceived as less effective. Lessons learned in implementing CHW compensation schemes involved the need for government leadership, ministerial coordination, community engagement, partner harmonization, and realistic transitional financing plans., Conclusion: Policymakers should consider these findings in designing compensation schemes for CHWs engaged in routine, continuous health service delivery within the context of their country's health service delivery model. Systematic documentation of the tasks and time commitment of volunteer status CHWs could support more recognition of their health system contributions and better determination of commensurate compensation as recommended by the 2018 World Health Organization Guidelines on Health Policy and System Support to Optimize Community Health Worker Programs., (© Davis et al.)
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- 2024
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18. Prevalence of high-risk human papillomavirus genotypes in outpatient Malian women living with HIV: a pilot study.
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Traore B, Kassogue Y, Diakite B, Diarra F, Cisse K, Kassogue O, Diarra M, Coulibaly A, Coulibaly B, Diallo H, Diarra Z, Ly M, Maiga A, Sissoko SB, Sissoko AS, Traore CB, Kamate B, Teguete I, Bah S, Dolo G, Gursel DB, Holl J, Hou L, and Maiga M
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- Adult, Female, Humans, Middle Aged, Genotype, Mali epidemiology, Outpatients statistics & numerical data, Pilot Projects, Prevalence, HIV Infections virology, HIV Infections epidemiology, Human Papillomavirus Viruses genetics, Papillomavirus Infections virology, Papillomavirus Infections epidemiology
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Introduction: Long-term exposure to high-risk human papillomavirus (Hr-HPV) is a well-known necessary condition for development of cervical cancer. The aim of this study is to screen for Hr-HPV using vaginal self-sampling, which is a more effective approach to improve women's adherence and increase screening rates., Methods: This pilot study included a total of 100 Women living with HIV (WLWHIV), recruited from the Center for Listening, Care, Animation, and Counseling of People Living with HIV in Bamako. Hr-HPV genotyping was performed on Self-collected samples using the Cepheid GeneXpert instrument., Results: The median age of WLWHIV was 44 (interquartile range [IQR], 37-50) years. Approximately 92% of the study participants preferred self-sampling at the clinic, and 90% opted to receive result notifications via mobile phone contact. The overall prevalence of Hr-HPV among study participants was 42.6%, and the most frequent Hr-HPV sub-types observed were HPV18/45 (19.1%), HPV31/35/33/52/58 (13.8%), and HPV39/68/56/66 (12.8%), followed by HPV16 (5.3%), and HPV51/59 (5.3%). WLWHIV under 35 years of age had a higher frequency of Hr-HPV compared to their older counterparts, with rates of 30% versus 11.1% (p = 0.03). The duration of antiretroviral treatment showed an inverse association with Hr-HPV negativity, with patients on treatment for 15 (IQR, 10-18) years versus 12 (IQR = 7-14) years for Hr-HPV positive patients (95% CI [1.2-5.8], t = 3.04, p = 0.003). WLWHIV with baseline CD4 T-Cell counts below 200 exhibited a higher frequency of Hr-HPV compared to those with baseline CD4 T-Cell counts above 200 (17.9% versus 1.9%, p = 0.009). However, other demographics and clinical factors, such as marital status, age of sexual debut, parity, education, history of abortion, history of preeclampsia, and cesarean delivery, did not influence the distribution of Hr-HPV genotypes., Conclusion: Our findings indicate that WLWHIV under the age of 35 years old exhibited the highest prevalence of Hr-HPV infection, with HPV18/45 being the most prevalent subtype. Additionally, WLWHIV with baseline CD4 T-Cell counts below 200 showed the highest infection rates., (© 2024. The Author(s).)
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- 2024
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19. Normal Clinical Laboratory Ranges by Age and Sex, and Impact on Study Screening Outcomes in Rural Mali.
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Doucoure M, Zeguime A, Niangaly A, Guindo MA, Doritchamou JYA, Assadou MH, Katile A, Kanoute MB, Perou S, Ouattara A, Sanogo S, Ouologuem B, Traore S, Dao B, Dembele D, Kone M, Kamate B, Sissoko K, Sankare S, Diarra S, Dolo A, Sissoko MS, Hume JCC, Cook D, Healy SA, Gorres JP, Traoré B, Gamiel J, Duffy PE, and Sagara I
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- Humans, Mali epidemiology, Male, Female, Adolescent, Adult, Child, Child, Preschool, Reference Values, Middle Aged, Infant, Young Adult, Aged, Aged, 80 and over, Age Factors, Sex Factors, Hemoglobins analysis, Creatinine blood, Laboratories, Clinical, Blood Cell Count, Rural Population statistics & numerical data
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The interpretation of a laboratory test result requires an appropriate reference range established in healthy subjects, and normal ranges may vary by factors such as geographic region, sex, and age. We examined hematological and clinical chemistry parameters in healthy residents at two rural vaccine trial sites: Bancoumana and Doneguebougou in Mali, West Africa. During screening of clinical studies in 2018 and 2019, peripheral blood samples from 1,192 apparently healthy individuals age 6 months to 82 years were analyzed at a laboratory accredited by the College of American Pathologists for a complete blood count, and creatinine and/or alanine aminotransferase levels. Based on manufacturers' reference range values, which are currently used in Malian clinical laboratories, abnormal values were common in this healthy population. In fact, 30.4% of adult participants had abnormal neutrophil levels and 19.8% had abnormal hemoglobin levels. Differences by sex were observed in those who were older, but not in those younger than 10 years, for several parameters, including hemoglobin, platelet, and absolute neutrophil counts in hematology, and creatinine in biochemistry. The site-specific reference intervals we report can be used in malaria vaccine clinical trials and other interventional studies, as well as in routine clinical care, to identify abnormalities in hematological and biochemical parameters among healthy Malian trial participants.
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- 2024
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20. Use of Supervision Data to Improve Quality of Care for Malaria in Pregnancy: Experience in Six African Countries.
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Wolf K, Mostel J, Oseni L, Gomez P, Kibuka T, Emerson C, Gutman JR, Malpass A, Youll S, Mukamba JY, Tchinda Meli E, Achu D, Tjek P, Assa JL, Silue M, Tanoh MA, Kokrasset-Yah C, Babanawo F, Asiedu A, Komey M, Boateng P, Mabiria M, Ngindu A, Njiru P, Omar AH, Sidibe FA, Diallo C, Kamate B, Kone A, Elisha S, Maiga AD, Mayaki AI, Tidjani Issa Gana F, and Tetteh G
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- Female, Pregnancy, Humans, Pyrimethamine therapeutic use, Sulfadoxine therapeutic use, Prenatal Care, Kenya, Quality of Health Care, Drug Combinations, Antimalarials therapeutic use, Maternal Health Services, Malaria drug therapy, Malaria prevention & control, Pregnancy Complications, Parasitic prevention & control, Pregnancy Complications, Parasitic drug therapy
- Abstract
Malaria in pregnancy (MiP) intervention coverage, especially intermittent preventive treatment in pregnancy (IPTp), lags behind other global malaria indicators. In 2020, across Africa, only 32% of eligible pregnant women received at least three IPTp doses, despite high antenatal care attendance. We conducted a secondary analysis of data collected during Outreach Training and Supportive Supervision visits from 2019 to 2020 to assess quality of care and explore factors contributing to providers' competence in providing IPTp, insecticide-treated nets, malaria case management, and respectful maternity care. Data were collected during observations of provider-patient interactions in six countries (Cameroon, Cote d'Ivoire, Ghana, Kenya, Mali, and Niger). Competency scores (i.e., composite scores of supervisory checklist observations) were calculated across three domains: MiP prevention, MiP treatment, and respectful maternity care. Scores are used to understand drivers of competency, rather than to assess individual health worker performance. Country-specific multilinear regressions were used to assess how competency score was influenced by commodity availability, training, provider gender and cadre, job aid availability, and facility type. Average competency scores varied across countries: prevention (44-90%), treatment (78-90%), and respectful maternity care (53-93%). The relative association of each factor with competency score varied. Commodity availability, training, and access to job aids correlated positively with competency in multiple countries. To improve MiP service quality, equitable access to training opportunities for different cadres, targeted training, and access to job aids and guidelines should be available for providers. Collection and analysis of routine supervision data can support tailored actions to improve quality MiP services.
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- 2023
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21. Malaria transmission-blocking vaccines Pfs230D1-EPA and Pfs25-EPA in Alhydrogel in healthy Malian adults; a phase 1, randomised, controlled trial.
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Sagara I, Healy SA, Assadou MH, Kone M, Swihart BJ, Kwan JL, Fintzi J, Sissoko K, Kamate B, Samake Y, Guindo MA, Doucoure M, Niaré K, Dolo A, Diarra B, Rausch KM, Narum DL, Jones DS, MacDonald NJ, Zhu D, Gorres JP, Imeru A, Mohan R, Thera I, Zaidi I, Salazar-Miralles F, Duan J, Neal J, Morrison RD, Muratova O, Sylla D, O'Connell EM, Wu Y, Hume JCC, Coulibaly MB, Anderson CF, Traore SF, Doumbo OK, and Duffy PE
- Subjects
- Animals, Adult, Humans, Adolescent, Young Adult, Middle Aged, Aluminum Hydroxide, Plasmodium falciparum, Double-Blind Method, Immunogenicity, Vaccine, Malaria, Falciparum, Malaria Vaccines adverse effects, Meningococcal Vaccines
- Abstract
Background: Malaria transmission-blocking vaccines target mosquito-stage parasites and will support elimination programmes. Gamete vaccine Pfs230D1-EPA/Alhydrogel induced superior activity to zygote vaccine Pfs25-EPA/Alhydrogel in malaria-naive US adults. Here, we compared these vaccines in malaria-experienced Malians., Methods: We did a pilot safety study then double-blind, block-randomised, comparator-controlled main-phase trial in malaria-intense Bancoumana, Mali. 18-50-year-old healthy non-pregnant, non-breastfeeding consenting adult residents were randomly assigned (1:1:1:1) to receive four doses at months 0, 1, 4·5, and 16·5 of either 47 μg Pfs25, 40 μg Pfs230D1 or comparator (Twinrix or Menactra)-all co-administered with normal saline for blinding-or 47 μg Pfs25 plus 40 μg Pfs230D1 co-administered. We documented safety and tolerability (primary endpoint in the as-treated populations) and immunogenicity (secondary endpoint in the as-treated populations: ELISA, standard-membrane-feeding assay, and mosquito direct skin feed assay). This trial is registered at ClinicalTrials.gov, NCT02334462., Findings: Between March 19, and June 2, 2015, we screened 471 individuals. Of 225 enrolled for the pilot and main cohorts, we randomly assigned 25 participants to pilot safety cohort groups of five (20%) to receive a two-dose series of Pfs25-EPA/Alhydrogel (16 μg), Pfs230D1-EPA/Alhydrogel (15 μg) or comparator, followed by Pfs25-EPA/Alhydrogel (16 μg) plus Pfs230D1-EPA/Alhydrogel (15 μg) or comparator plus saline. For the main cohort, we enrolled 200 participants between May 11 and June 2, 2015, to receive a four-dose series of 47 μg Pfs25-EPA/Alhydrogel plus saline (n=50 [25%]; Pfs25), 40 μg Pfs230D1-EPA/Alhydrogel plus saline (n=49 [25%]; Pfs230D1), 47 μg Pfs25-EPA/Alhydrogel plus 40 μg Pfs230D1-EPA/Alhydrogel (n=50 [25%]; Pfs25 plus Pfs230D1), or comparator (Twinrix or Menactra) plus saline (n=51 [25%]). Vaccinations were well tolerated in the pilot safety and main phases. Most vaccinees became seropositive after two Pfs230D1 or three Pfs25 doses; peak titres increased with each dose thereafter (Pfs230D1 geometric mean: 77·8 [95% CI 56·9-106·3], 146·4 [108·3-198·0], and 410·2 [301·6-558·0]; Pfs25 geometric mean 177·7 [130·3-242·4] and 315·7 [209·9-474·6]). Functional activity (mean peak transmission-reducing activity) appeared for Pfs230D1 (74·5% [66·6-82·5]) and Pfs25 plus Pfs230D1 (68·6% [57·3-79·8]), after the third dose and after the fourth dose (88·9% [81·7-96·2] for Pfs230D1 and 85·0% [78·4-91·5] Pfs25 plus Pfs230D1) but not for Pfs25 (58·2% [49·1-67·3] after the third dose and 58·2% [48·5-67·9] after the fourth dose). Pfs230D1 transmission-reducing activity (73·7% [64·1-83·3]) persisted 10 weeks after the fourth dose. Transmission-reducing activity of 80% was estimated at 1659 ELISA units for Pfs25, 218 for Pfs230D1, and 223 for Pfs230D1 plus Pfs25. After 3850 direct skin feed assays, 35 participants (12 Pfs25, eight Pfs230D1, five Pfs25 plus Pfs230D1, and ten comparator) had transmitted parasites at least once. The proportion of positive assays in vaccine groups (Pfs25 33 [3%] of 982 [-0·013 to 0·014], Pfs230D1 22 [2%] of 954 [-0·005 to 0·027], and combination 11 [1%] of 940 [-0·024 to 0·002]) did not differ from that of the comparator (22 [2%] of 974), nor did Pfs230D1 and combination groups differ (-0·024 to 0·001)., Interpretation: Pfs230D1 but not Pfs25 vaccine induces durable serum functional activity in Malian adults. Direct skin feed assays detect parasite transmission to mosquitoes but increased event rates are needed to assess vaccine effectiveness., Funding: Intramural Research Program of the National Institute of Allergy and Infectious Diseases and US National Institutes of Health., Competing Interests: Declaration of interests We declare no competing interests., (Copyright © 2023 Elsevier Ltd. All rights reserved.)
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- 2023
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22. Global variations in lung cancer incidence by histological subtype in 2020: a population-based study.
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Zhang Y, Vaccarella S, Morgan E, Li M, Etxeberria J, Chokunonga E, Manraj SS, Kamate B, Omonisi A, and Bray F
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- Humans, Male, Female, Incidence, Europe, Eastern, Lung Neoplasms epidemiology, Lung Neoplasms pathology, Small Cell Lung Carcinoma epidemiology, Adenocarcinoma epidemiology, Adenocarcinoma pathology, Carcinoma, Squamous Cell epidemiology
- Abstract
Background: Lung cancer is the second most common cancer worldwide, yet the distribution by histological subtype remains unknown. We aimed to quantify the global, regional, and national burden of lung cancer incidence for the four main subtypes in 185 countries and territories., Methods: In this population-based study, we used data from Cancer Incidence in Five Continents Volume XI and the African Cancer Registry Network to assess the proportions of adenocarcinoma, squamous cell carcinoma, small-cell carcinoma, and large-cell carcinoma among all lung cancers by country, sex, and age group and subsequently applied these data to corresponding national (GLOBOCAN) estimates of lung cancer incidence in 2020. Unspecified morphologies were reallocated to specified subtypes. Age-standardised incidence rates were calculated using the world standard population to compare subtype risks worldwide, adjusted for differences in age composition between populations by country., Findings: In 2020, there were an estimated 2 206 771 new cases of lung cancer, with 1 435 943 in males and 770 828 in females worldwide. In males, 560 108 (39%) of all lung cancer cases were adenocarcinoma, 351 807 (25%) were squamous cell carcinoma, 163 862 (11%) were small-cell carcinoma, and 115 322 (8%) were large-cell carcinoma cases. In females, 440 510 (57%) of all lung cancer cases were adenocarcinoma, 91 070 (12%) were squamous cell carcinoma, 68 224 (9%) were small-cell carcinoma, and 49 246 (6%) were large-cell carcinoma cases. Age-standardised incidence rates for adenocarcinoma, squamous cell carcinoma, small-cell carcinoma, and large-cell carcinoma, respectively, were estimated to be 12·4, 7·7, 3·6, and 2·6 per 100 000 person-years in males and 8·3, 1·6, 1·3, and 0·9 per 100 000 person-years in females worldwide. The incidence rates of adenocarcinoma exceeded those of squamous cell carcinoma in 150 of 185 countries in males and in all 185 countries in females. The highest age-standardised incidence rates per 100 000 person-years for adenocarcinoma, squamous cell carcinoma, small-cell carcinoma, and large-cell carcinoma, respectively, for males occurred in eastern Asia (23·5), central and eastern Europe (17·5), western Asia (7·2), and south-eastern Asia (11·0); and for females occurred in eastern Asia (16·0), northern America (5·4), northern America (4·7), and south-eastern Asia (3·4). The incidence of each subtype showed a clear gradient according to the Human Development Index for male and female individuals, with increased rates in high and very high Human Development Index countries., Interpretation: Adenocarcinoma has become the most common subtype of lung cancer globally in 2020, with incidence rates in males exceeding those of squamous cell carcinoma in most countries, and in females in all countries. Our findings provide new insights into the nature of the global lung cancer burden and facilitates tailored national preventive actions within each world region., Funding: None., Competing Interests: Declaration of interests We declare no competing interests., (Copyright © 2023 World Health Organization. Published by Elsevier Ltd. All rights reserved. Published by Elsevier Ltd.. All rights reserved.)
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- 2023
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23. Trends in the incidence of ovarian cancer in sub-Saharan Africa.
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Gizaw M, Parkin DM, Stöter O, Korir A, Kamate B, Liu B, Bojang L, N'Da G, Manraj SS, Bukirwa P, Chokunonga E, Chingonzoh T, Peko JF, Finesse A, Somdyala N, Ladipo A, and Kantelhardt EJ
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- Humans, Female, Incidence, Cote d'Ivoire epidemiology, Kenya, Nigeria, Uganda, Zimbabwe, Carcinoma, Ovarian Epithelial epidemiology, Ovarian Neoplasms epidemiology
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Ovarian cancer (OC) is one of the commonest cancers of women in sub-Saharan Africa (SSA), although to date no data have been available on time trends in incidence to better understand the disease pattern in the region. We estimate time trends by histological subtype from 12 population-based cancer registries in 11 countries: Kenya (Nairobi), Mauritius, Seychelles, Uganda (Kampala), Congo (Brazzaville), Zimbabwe (Bulawayo and Harare), Cote d'Ivoire (Abidjan), The Gambia, Mali (Bamako), Nigeria (Ibadan) and South Africa (Eastern Cape). The selected registries were those that could provide consistent estimates of the incidence of ovarian cancer and with quality assessment for periods of 10 or more years. A total of 5423 cases of OC were included. Incidence rates have been increasing in all registries except Brazzaville, Congo, where a nonsignificant decline of 1% per year was seen. Statistically significant average annual increases were seen in Mauritius (2.5%), Bamako (5.3%), Ibadan (3.9%) and Eastern Cape (8%). Epithelial ovarian cancer was responsible for the increases observed in all registries. Statistically significant average annual percentage changes (AAPC) for epithelial OC were present in Bamako (AAPC = 5.9%), Ibadan (AAPC = 4.7%) and Eastern Cape (AAPC = 11.0%). Creating awareness among professionals of the growing importance of the disease is surely an important step to improving availability of, and access to, diagnosis and treatment of OC in SSA. Support must be given to the cancer registries to improve the availability of good-quality data on this important cancer., (© 2022 The Authors. International Journal of Cancer published by John Wiley & Sons Ltd on behalf of UICC.)
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- 2023
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24. Lack of Association of C677T Methylenetetrahydrofolate Reductase Polymorphism with Breast Cancer Risk in Mali.
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Diakite B, Kassogue Y, Maiga M, Dolo G, Kassogue O, Holl JL, Joyce B, Wang J, Cisse K, Diarra F, Keita ML, Traore CB, Kamate B, Sissoko SB, Coulibaly B, Sissoko AS, Traore D, Sidibe FM, Bah S, Teguete I, Ly M, Nadifi S, Dehbi H, Kim K, Murphy R, and Hou L
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- Female, Humans, Homocysteine, Mali, Methionine, S-Adenosylmethionine, Breast Neoplasms genetics, Methylenetetrahydrofolate Reductase (NADPH2) genetics
- Abstract
Methylenetetrahydrofolate reductase (MTHFR) plays a major role in the metabolism of folates and homocysteine, which in turn can affect gene expression and ultimately promote the development of breast cancer. Thus, mutations in the MTHFR gene could influence homocysteine, methionine, and S-adenosylmethionine levels and, indirectly, nucleotide levels. Imbalance in methionine and S-adenosylmethionine synthesis affects protein synthesis and methylation. These changes, which affect gene expression, may ultimately promote the development of breast cancer. We therefore hypothesized that such mutations could also play an important role in the occurrence and pathogenesis of breast cancer in a Malian population. In this study, we used the PCR-RFLP technique to identify the different genotypic profiles of the C677T MTHFR polymorphism in 127 breast cancer women and 160 healthy controls. The genotypic distribution of the C677T polymorphism in breast cancer cases was 88.2% for CC, 11.0% for CT, and 0.8% for TT. Healthy controls showed a similar distribution with 90.6% for CC, 8.8% for CT, and 0.6% for TT. We found no statistical association between the C677T polymorphism and breast cancer risk for the codominant models CT and TT ( p > 0.05). The same trend was observed when the analysis was extended to other genetic models, including dominant ( p = 0.50), recessive ( p = 0.87), and additive ( p = 0.50) models. The C677T polymorphism of MTHFR gene did not influence the risk of breast cancer in the Malian samples., Competing Interests: The authors declare that they have no conflicts of interest., (Copyright © 2023 Brehima Diakite et al.)
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- 2023
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25. [Management Of Blader Exstrophy In Children At The CHU Gabriel Touré].
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Amadou I, Coulibaly YM, Coulibaly OM, Konaté D, Coulibaly Y, Coulibaly MT, Maiga B, Doumbia A, Traoré F, Karembé B, Djire MK, Kamate B, Daou MB, Barry A, Cissé ME, Coulibaly O, and Dembélé A
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- Male, Child, Female, Humans, Infant, Retrospective Studies, Prospective Studies, Urinary Bladder, Bladder Exstrophy epidemiology, Bladder Exstrophy surgery, Bladder Exstrophy complications, Digestive System Abnormalities complications
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Aims: To describe the clinical and evolutionary aspects of the primary closure of exstrophy at the CHU Gabriel Touré., Materials and Methods: This was a retrospective and prospective study carried out from January 2014 to December 2019 in all the children admitted and operated on for bladder exstrophy at the CHU Gabriel Touré., Results: We collected 35 cases of exstrophy, ie25 boys and 10 girls. The mean age at diagnosis was 4.8 months. The bladder plate was both normal and budded, ie 28.6% of cases. Plaque infection was found in 45.7%. A malformation was associated in 34.3% of cases. Primary plaque closure was achieved in all of our patients. Postoperative morbidity was 28.6% of cases and mortality 11.4% of cases., Conclusion: Bladder exstrophy is a rare malformation of the urogenital sphere, its management is complex and its mortality is not null., (Le comité de rédaction se réserve le droit de renvoyer aux auteurs avant toute soumission à l'avis des lecteurs les manuscrits qui ne seraient pas conformes à ces modalités de présentation. En outre il leur conseille de conserver un exemplaire du manuscrit, des figures et des tableaux.)
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- 2023
26. [Contribution of CT scan and radio-histological concordance in the diagnosis of maxillomandibular tumors at the Dental University Hospital of BAMAKO].
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Kouma A, Keïta K, Berete Z, Kamate B, Ba B, and Sidibe S
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Introduction: The aim of this study was to investigate the contribution of computed tomography (CT) and its degree of concordance with pathological examination in the etiological diagnosis of maxillomandibulartumours., Materials and Methods: Our study was cross-sectional, retrospective and prospective. It took place over a period of five years and six months and included cases of maxilla-mandibulartumours confirmed by pathological examination after clinical examination and CT scan. Data were collected from medical records, entered and analysed with SPSS 21.0 software., Results: Men represented 55.7% of cases with a sex ratio of 1.25. The duration of symptoms on presentation varied from 1 month to 27 years (mean 24.37+/- 48 months). This consultation was motivated in 92.6% of cases by a mandibular swelling. Squamous cell carcinomas were the most common on pathological examination with 34.2% of cases followed by ameloblastomas in 24.2% of cases. There was good agreement between the results of the CT scan and those of the pathological examination (Cohen's Kappa=0.77)., Conclusion: CT remains a reliable tool in the diagnosis of maxillomandibulartumours., (Le comité de rédaction se réserve le droit de renvoyer aux auteurs avant toute soumission à l'avis des lecteurs les manuscrits qui ne seraient pas conformes à ces modalités de présentation. En outre il leur conseille de conserver un exemplaire du manuscrit, des figures et des tableaux.)
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- 2023
27. Recent malaria does not substantially impact COVID-19 antibody response or rates of symptomatic illness in communities with high malaria and COVID-19 transmission in Mali, West Africa.
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Woodford J, Sagara I, Diawara H, Assadou MH, Katile A, Attaher O, Issiaka D, Santara G, Soumbounou IH, Traore S, Traore M, Dicko OM, Niambele SM, Mahamar A, Kamate B, Haidara B, Sissoko K, Sankare S, Diarra SDK, Zeguime A, Doritchamou JYA, Zaidi I, Dicko A, and Duffy PE
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- Antibody Formation, Asymptomatic Infections epidemiology, Humans, Mali epidemiology, Pandemics, Parasitemia epidemiology, COVID-19 epidemiology, Malaria epidemiology
- Abstract
Malaria has been hypothesized as a factor that may have reduced the severity of the COVID-19 pandemic in sub-Saharan Africa. To evaluate the effect of recent malaria on COVID-19 we assessed a subgroup of individuals participating in a longitudinal cohort COVID-19 serosurvey that were also undergoing intensive malaria monitoring as part of antimalarial vaccine trials during the 2020 transmission season in Mali. These communities experienced a high incidence of primarily asymptomatic or mild COVID-19 during 2020 and 2021. In 1314 individuals, 711 were parasitemic during the 2020 malaria transmission season; 442 were symptomatic with clinical malaria and 269 had asymptomatic infection. Presence of parasitemia was not associated with new COVID-19 seroconversion (29.7% (211/711) vs. 30.0% (181/603), p=0.9038) or with rates of reported symptomatic seroconversion during the malaria transmission season. In the subsequent dry season, prior parasitemia was not associated with new COVID-19 seroconversion (30.2% (133/441) vs. 31.2% (108/346), p=0.7499), with symptomatic seroconversion, or with reversion from seropositive to seronegative (prior parasitemia: 36.2% (64/177) vs. no parasitemia: 30.1% (37/119), p=0.3842). After excluding participants with asymptomatic infection, clinical malaria was also not associated with COVID-19 serostatus or symptomatic seroconversion when compared to participants with no parasitemia during the monitoring period. In communities with intense seasonal malaria and a high incidence of asymptomatic or mild COVID-19, we did not demonstrate a relationship between recent malaria and subsequent response to COVID-19. Lifetime exposure, rather than recent infection, may be responsible for any effect of malaria on COVID-19 severity., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Woodford, Sagara, Diawara, Assadou, Katile, Attaher, Issiaka, Santara, Soumbounou, Traore, Traore, Dicko, Niambele, Mahamar, Kamate, Haidara, Sissoko, Sankare, Diarra, Zeguime, Doritchamou, Zaidi, Dicko and Duffy.)
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- 2022
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28. Influence of CYP2B6 and CYP3A4 polymorphisms on the virologic and immunologic responses of patients treated with efavirenz-containing regimen.
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Kassogue Y, Diakite B, Maiga M, Kassogue O, Konate I, Tamboura K, Diarra F, Diarra Z, Sawadogo MK, Goita Y, Sissoko SB, Sissoko AS, Guirou N, Dehbi H, Nadifi S, Bah S, Traore CB, Kamate B, Dao S, and Dolo G
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- Alkynes, Cytochrome P-450 CYP2B6 genetics, Cytochrome P-450 CYP2B6 Inhibitors pharmacology, Cytochrome P-450 CYP3A genetics, Genotype, Humans, Polymorphism, Single Nucleotide, Anti-HIV Agents pharmacology, Benzoxazines pharmacology, Cyclopropanes pharmacology, HIV Infections drug therapy, HIV Infections enzymology, HIV Infections genetics
- Abstract
Objectives: The main objective of this study was to evaluate the effect of CYP2B6 and CYP3A4 polymorphisms on the virological and immunologic responses of HIV patients. A total of 153 HIV-positive patients were enlisted for the study., Patients and Methods: Viral load and median CD4 T cell counts were evaluated at baseline and month 6 (M6). Samples were identified using TaqMan genotyping assays., Results: The AG in CYP2B6 rs2279343 was associated with VLS compared to homozygous AA. In the dominant model, the AG/GG genotypes were associated with VLS compared to the AA genotype. Moreover, in overdominant model, the AG genotype was associated with VLS compared to AA/GG. Regarding immunological response, only the AG in SNP rs2279343 CYP2B6 was associated with an increase in CD4 cell count between baseline and M6. In CYP2B6 rs3745274, the CD4 cell count at M6 was higher than that of baseline for GG carriers and for GT carriers. In CYP3A4 rs2740574, the TC carriers showed a higher median CD4 count at M6 compared to that of the baseline count, as well as for CC carriers. The best genotypes combination associated with CD4 cell count improvement were AA/AG in SNP rs2279343 and GG/GT in SNP rs3745274., Conclusion: Our findings support the fact that CYP2B6 rs2279343 could help in the prediction of VLS and both SNPs rs3745274 and rs2279343 in CYP2B6 and CYP3A4 rs2740574 were associated with immune recovery in Malian HIV-positive patients., (Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2022
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29. Association of the Interleukin-10-592C/A Polymorphism and Cervical Cancer Risk: A Meta-Analysis.
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Diakite B, Kassogue Y, Maiga M, Dolo G, Kassogue O, Musa J, Morhason-Bello I, Traore B, Traore CB, Kamate B, Coulibaly A, Bah S, Nadifi S, Murphy R, Holl JL, and Hou L
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- Asian People, Female, Genetic Predisposition to Disease, Humans, Polymorphism, Single Nucleotide genetics, Risk Factors, Interleukin-10 genetics, Uterine Cervical Neoplasms genetics
- Abstract
A literature review showed some discrepancies regarding the association of -592C/A with the risk of cervical cancer. To allow more precise analysis of the data by increasing the number of cases studied and more acceptable generalization by considering results from different sources, the present meta-analysis was performed on available published studies that explored the relationship between SNP -592C/A of the IL-10 gene and the risk of cervical cancer. Eleven available studies, including 4187 cases and 3311 controls, were included in this study investigating the relationship between the -592C/A polymorphism of IL-10 and cervical cancer risk. Fixed-effects or random-effects models were performed with pooled odds ratios (ORs). Heterogeneity and bias tests were performed by the inconsistency test and funnel plot, respectively. The overall analysis showed an increased susceptibility to cervical cancer with the -592C/A polymorphism of the IL-10 gene for the recessive model (OR = 1.30, 95% CI = 1.14-1.49), dominant model (OR = 1.36, 95% CI = 1.09-1.70), and additive model (OR = 1.25, 95% CI = 1.09-1.44). Regarding ethnicity, a significant association of the -592C/A polymorphism of the IL-10 gene was linked to an elevated risk of cervical cancer for all genetic models (recessive, dominant, and additive) in the Asian populations and for the recessive and additive models in Caucasians with P < 0.05. The -592C/A polymorphism of the IL-10 gene may be considered a risk factor for cervical cancer., Competing Interests: The authors declare that there are no conflicts of interest regarding the publication of this paper., (Copyright © 2022 Brehima Diakite et al.)
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- 2022
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30. Effect of seasonal malaria chemoprevention in children between 5 and 9 years old in Kita and Bafoulabe districts, Mali.
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Diawara SI, Konaté D, Kayentao K, Mihigo J, Shaffer JG, Sangare M, Ndabamenye P, Swedberg E, Garg LW, Gamache N, Keita B, Kamate B, Ndaruhutse P, Kone D, Sanogo V, Tounkara M, Diakité M, Doumbia S, and Eckert E
- Abstract
Background: Seasonal malaria chemoprevention (SMC) has been widely expanded in Mali since its recommendation by the the World Health Organization in 2012. SMC guidelines currently target children between three months and five years of age. The SMC initiative has been largely successful. Children at least five years of age are not currently covered by current SMC guidelines but bear a considerable portion of the malaria burden. For this reason, this study sought to determine the feasibility and effectiveness for extending SMC to children aged 5-9 years., Methods: A non-randomized, pre-post study was performed with an intervention district (Kita) and a comparison district (Bafoulabe). Children aged 3-59 months received SMC in both comparison districts, and children aged 60-120 months received SMC in the intervention district. SMC was delivered as sulfadoxine-pyriméthamine plus amodiaquine (SP-AQ) at monthly intervals from July to October in 2017 and 2018 during the historical transmission seasons. Baseline and endline cross-sectional surveys were conducted in both comparison districts. A total of 200 household surveys were conducted at each of the four monthly SMC cycles to determine adherence and tolerance to SMC in the intervention district., Results: In July 2017, 633 children aged 60-120 months old were enrolled at the Kita and Bafoulabe study sites ( n = 310 and n = 323, respectively). Parasitemia prevalence was similar in the intervention and comparison districts prior the SMC campaign (27.7% versus 21.7%, p = 0.07). Mild anemia was observed in 14.2% children in Kita and in 10.5% of children in Bafoulabé. At the Kita site, household surveys showed an SMC coverage rate of 89.1% with a response rate of 93.3% among child caregivers. The most common adverse event reported by parents was drowsiness (11.8%). One year following SMC implementation in the older age group in Kita, the coverage of three doses per round was 81.2%. Between the baseline and endline surveys, there was a reduction in parasitemia prevalence of 40% (OR = 0.60, CI: 0.41-0.89). Malaria molecular resistance was low in the intervention district following the intervention. A significant reduction in the prevalence of parasitemia in children 60 to 120 months was observed in the intervention district, but the prevalance of clinical malaria remained relatively constant., Conclusion: This study shows that the prospect of extending SMC coverage to children between five and nine years old is encouraging. The reduction in the parasitemia could also warrant consideration for adapting SMC policy to account for extended malaria transmission seasons., Competing Interests: The authors declare that they have no competing interests., (© 2022 Published by Elsevier Ltd on behalf of World Federation of Parasitologists.)
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- 2022
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31. Safety and efficacy of a three-dose regimen of Plasmodium falciparum sporozoite vaccine in adults during an intense malaria transmission season in Mali: a randomised, controlled phase 1 trial.
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Sissoko MS, Healy SA, Katile A, Zaidi I, Hu Z, Kamate B, Samake Y, Sissoko K, Mwakingwe-Omari A, Lane J, Imeru A, Mohan R, Thera I, Guindo CO, Dolo A, Niare K, Koïta F, Niangaly A, Rausch KM, Zeguime A, Guindo MA, Bah A, Abebe Y, James ER, Manoj A, Murshedkar T, Kc N, Sim BKL, Billingsley PF, Richie TL, Hoffman SL, Doumbo O, and Duffy PE
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- Adolescent, Adult, Animals, Child, Double-Blind Method, Humans, Mali, Middle Aged, Pilot Projects, Plasmodium falciparum, Seasons, Sporozoites, Young Adult, Malaria drug therapy, Malaria Vaccines, Malaria, Falciparum drug therapy
- Abstract
Background: WHO recently approved a partially effective vaccine that reduces clinical malaria in children, but increased vaccine activity is required to pursue malaria elimination. A phase 1 clinical trial was done in Mali, west Africa, to assess the safety, immunogenicity, and protective efficacy of a three-dose regimen of Plasmodium falciparum sporozoite (PfSPZ) Vaccine (a metabolically active, non-replicating, whole malaria sporozoite vaccine) against homologous controlled human malaria infection (CHMI) and natural P falciparum infection., Methods: We recruited healthy non-pregnant adults aged 18-50 years in Donéguébougou, Mali, and surrounding villages (Banambani, Toubana, Torodo, Sirababougou, Zorokoro) for an open-label, dose-escalation pilot study and, thereafter, a randomised, double-blind, placebo-controlled main trial. Pilot study participants were enrolled on an as-available basis to one group of CHMI infectivity controls and three staggered vaccine groups receiving: one dose of 4·5 × 10
5 , one dose of 9 × 105 , or three doses of 1·8 × 106 PfSPZ via direct venous inoculation at approximately 8 week intervals, followed by homologous CHMI 5 weeks later with infectious PfSPZ by direct venous inoculation (PfSPZ Challenge). Main cohort participants were stratified by village and randomly assigned (1:1) to receive three doses of 1·8 × 106 PfSPZ or normal saline at 1, 13, and 19 week intervals using permuted block design by the study statistician. The primary outcome was safety and tolerability of at least one vaccine dose; the secondary outcome was vaccine efficacy against homologous PfSPZ CHMI (pilot study) or against naturally transmitted P falciparum infection (main study) measured by thick blood smear. Combined artesunate and amodiaquine was administered to eliminate pre-existing parasitaemia. Outcomes were analysed by modified intention to treat (mITT; including all participants who received at least one dose of investigational product; safety and vaccine efficacy) and per protocol (vaccine efficacy). This trial is registered with ClinicalTrials.gov, number NCT02627456., Findings: Between Dec 20, 2015, and April 30, 2016, we enrolled 56 participants into the pilot study (five received the 4·5 × 105 dose, five received 9 × 105 , 30 received 1·8 × 106 , 15 were CHMI controls, and one withdrew before vaccination) and 120 participants into the main study cohort with 60 participants assigned PfSPZ Vaccine and 60 placebo in the main study. Adverse events and laboratory abnormalities post-vaccination in all dosing groups were few, mainly mild, and did not differ significantly between vaccine groups (all p>0·05). Unexpected severe transaminitis occured in four participants: one participant in pilot phase that received 1·8 × 106 PfSPZ Vaccine, one participant in main phase that received 1·8 × 106 PfSPZ Vaccine, and two participants in the main phase placebo group. During PfSPZ CHMI, approximately 5 weeks after the third dose of 1·8 × 106 PfSPZ, none of 29 vaccinees and one of 15 controls became positive on thick blood smear; subsequent post-hoc PCR analysis for submicroscopic blood stage infections detected P falciparum parasites in none of the 29 vaccine recipients and eight of 15 controls during CHMI. In the main trial, 32 (58%) of 55 vaccine recipients and 42 (78%) of 54 controls became positive on thick blood smear during 24-week surveillance after vaccination. Vaccine efficacy (1-hazard ratio) was 0·51 per protocol (95% CI 0·20-0·70; log-rank p=0·0042) and 0·39 by mITT (0·04-0·62; p=0·033); vaccine efficacy (1-risk ratio) was 0·24 per-protocol (0·02-0·41; p=0·031) and 0·22 mITT (0·01-0·39; p=0·041)., Interpretation: A three-dose regimen of PfSPZ Vaccine was safe, well tolerated, and conferred 51% vaccine efficacy against intense natural P falciparum transmission, similar to 52% vaccine efficacy reported for a five-dose regimen in a previous trial., Funding: US National Institute of Allergy and Infectious Diseases, National Institutes of Health, Sanaria., Translation: For the French translation of the abstract see Supplementary Materials section., Competing Interests: Declaration of interests YA, ERJ, TM, NK, BKLS, PFB, TLR, and SLH are salaried, full-time employees of Sanaria, the developer and sponsor of Sanaria PfSPZ Vaccine. All other authors declare no competing interests., (Copyright © 2022 Elsevier Ltd. All rights reserved.)- Published
- 2022
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32. [Contribution of CT scan and radio-histological concordance in the diagnosis of maxillomandibular tumors at the Dental University Hospital of BAMAKO].
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Kouma A, Keïta K, Berete Z, Kamate B, Ba B, and Sidibe S
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Introduction: The aim of this study was to investigate the contribution of computed tomography (CT) and its degree of concordance with pathological examination in the etiological diagnosis of maxillomandibulartumours., Materials and Methods: Our study was cross-sectional, retrospective and prospective. It took place over a period of five years and six months and included cases of maxilla-mandibulartumours confirmed by pathological examination after clinical examination and CT scan. Data were collected from medical records, entered and analysed with SPSS 21.0 software., Results: Men represented 55.7% of cases with a sex ratio of 1.25. The duration of symptoms on presentation varied from 1 month to 27 years (mean 24.37+/- 48 months). This consultation was motivated in 92.6% of cases by a mandibular swelling. Squamous cell carcinomas were the most common on pathological examination with 34.2% of cases followed by ameloblastomas in 24.2% of cases. There was good agreement between the results of the CT scan and those of the pathological examination (Cohen's Kappa=0.77)., Conclusion: CT remains a reliable tool in the diagnosis of maxillomandibulartumours., (Le comité de rédaction se réserve le droit de renvoyer aux auteurs avant toute soumission à l'avis des lecteurs les manuscrits qui ne seraient pas conformes à ces modalités de présentation. En outre il leur conseille de conserver un exemplaire du manuscrit, des figures et des tableaux.)
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- 2022
33. [Acute bursa of the child in pediatric surgery at the teaching hospital Gabriel Touré].
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Amadou I, Barry A, Traore B, Coulibaly MT, Coulibaly OM, Doumbia A, Traoré F, Karembé B, Djire MK, Kamate B, Daou MB, Coulibaly YM, Aguissa M, Konaté D, Cissé ME, Coulibaly O, Dembélé A, and Coulibaly Y
- Abstract
Acute bursa is a medico-surgical emergency because of its many etiologies threatening the functional prognosis of the testes and their appendages., Objectives: Identify the causes of acute bursaries in the child and describe their clinical and therapeutic aspects., Materials and Method: This was a retrospective descriptive study from January 1, 2010 to December 31, 2015 on all children aged 0 to 15 years received and treated for acute scholarship in the Pediatric Surgery department at the teaching hospital Gabriel Touré., Results: In 6 years, we registered 42 patients, ie a frequency of 1.4% of surgical emergencies. The mean age was 2.98 years (24 days-14 years). Prematurity represented 11.9% of cases. Painful scrotal tumefaction was the main reason for consultation (76.2%), The main aetiologies were HISE (90.5%), scrotal trauma (4.7%), orchi epididymitis (2.4%) and testicular torsion (2.4%). The treatment was surgical in 97.6% of cases. The course after 3 months was simple in 97.6% of cases., Conclusion: Acute bursa in children is an uncommon condition, especially affecting infants. Strangulated inguino-scrotal hernia was the main aetiology. The diagnosis must be early and the treatment adequate in order to reduce morbidity and mortality., (Le comité de rédaction se réserve le droit de renvoyer aux auteurs avant toute soumission à l'avis des lecteurs les manuscrits qui ne seraient pas conformes à ces modalités de présentation. En outre il leur conseille de conserver un exemplaire du manuscrit, des figures et des tableaux.)
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- 2022
34. [Treatment of cancer pain in Mali: Experience of the mother-child medical oncology service of the CHU in Bamako].
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Ly M, Kone FT, Samake K, Ly R, Dao F, Toure M, Kamate B, and Bah S
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- Adult, Aged, Cancer Care Facilities, Cancer Pain diagnosis, Cross-Sectional Studies, Female, Humans, Male, Mali, Maternal-Child Health Services, Middle Aged, Pain Measurement methods, Patient Acuity, Prospective Studies, Analgesics, Non-Narcotic therapeutic use, Analgesics, Opioid therapeutic use, Cancer Pain drug therapy, Morphine therapeutic use
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Two hundred patients were refereed for advanced cancer to the oncology department of Luxembourg Hospital in Bamako. All these patients reported intense pain (88 %) which was only treated before admission by OMS level 1 analgesics. It clearly shows that cancer pain is undertreated in Malian peripheral sanitary structures. After evaluation of the pain by analog visual and verbal scales patients, the appropriate analgesic drugs such as morphine (OMS level 3) were given. A control of the pain was obtained in all the patients (100 %) with a dramatic improvement in quality of life. This study emphasizes the need for a pain control program at the Malian state level with a basic education of care givers, hospital-centric networks and access to morphine and opioids at the different levels involved in cancer management., (Copyright © 2021. Published by Elsevier Masson SAS.)
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- 2021
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35. Distribution of alleles, genotypes and haplotypes of the CYP2B6 (rs3745274; rs2279343) and CYP3A4 (rs2740574) genes in the Malian population: Implication for pharmacogenetics.
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Kassogue Y, Diakite B, Kassogue O, Konate I, Tamboura K, Diarra Z, Maiga M, Dehbi H, Nadifi S, Traore CB, Kamate B, Dao S, Doumbia S, and Dolo G
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- Adolescent, Adult, Aged, Cytochrome P-450 CYP2B6 genetics, Cytochrome P-450 CYP3A genetics, Female, Humans, Malaysia ethnology, Male, Middle Aged, Pharmacogenetics methods, Alleles, Genotype, Haplotypes genetics
- Abstract
Abstract: Cytochrome P450 enzymes play a central role in the phase I biotransformation process of a wide range of compounds, including xenobiotics, drugs, hormones and vitamins. It is noteworthy that these enzymes are highly polymorphic and, depending on the genetic makeup, an individual may have impaired enzymatic activity. Therefore, the identification of genetic variants in these genes could facilitate the implementation of pharmacogenetic studies and genetic predisposition to multifactorial diseases. We have established the frequencies of CYP2B6 (rs3745274; rs2279343) and CYP3A4 (rs2740574) alleles and genotypes in 209 healthy Malian subjects using TaqMan drug metabolism genotyping assays for allelic discrimination. Allele frequencies were 37% for CYP2B6 rs3745274; 38% for CYP2B6 rs2279343; and 75% for CYP3A4 rs2740574 respectively. Overall, the frequencies observed in Mali are statistically comparable to those reported across Africa except North Africa. The major haplotypes in CYP2B6 rs3745274 and CYP2B6 rs2279343 were represented by GA (60.24%) followed by TG (35.36%). We noted a strong linkage disequilibrium between CYP2B6 rs3745274 and CYP2B6 rs2279343 with D' = 0.91 and r2 = 0.9. The frequencies of the genotypic combinations were 43.5% (GT/AG), 37.3% (GG/AA) and 11.5% (TT/GG) in the combination of CYP2B6-rs3745274 and CYP2B6-rs2279343; 26.8% (GT/CC), 25.4%, (GT/CT), 17.2% and GG/CT in the combination CYP2B6-rs3745274-CYP3A4-rs2740574; 26.8% (AG/CC), 23.9% (AA/CC), 19.1% (AG/CT), and 11% (AA/CT) in the combination CYP2B6-rs2279343-CYP3A4-rs2740574, respectively. The most common triple genotype was GT/AG/CC with 24.9%, followed by GG/AA/CC with 23.9%, GT/AG/CT with 16.7%, and GG/AA/CT with 10%. Our results provide new insights into the distribution of these pharmacogenetically relevant genes in the Malian population. Moreover, these data will be useful for studies of individual genetic variability to drugs and genetic predisposition to diseases., Competing Interests: The authors have no conflicts of interest to disclose., (Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.)
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- 2021
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36. Cost-effectiveness of district-wide seasonal malaria chemoprevention when implemented through routine malaria control programme in Kita, Mali using fixed point distribution.
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Diawara H, Walker P, Cairns M, Steinhardt LC, Diawara F, Kamate B, Duval L, Sicuri E, Sagara I, Sadou A, Mihigo J, Eckert E, Dicko A, and Conteh L
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- Chemoprevention economics, Child, Preschool, Drug Combinations, Humans, Infant, Mali, Seasons, Amodiaquine therapeutic use, Antimalarials therapeutic use, Communicable Disease Control economics, Cost-Benefit Analysis statistics & numerical data, Malaria prevention & control, Pyrimethamine therapeutic use, Sulfadoxine therapeutic use
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Background: Seasonal malaria chemoprevention (SMC) is a strategy for malaria control recommended by the World Health Organization (WHO) since 2012 for Sahelian countries. The Mali National Malaria Control Programme adopted a plan for pilot implementation and nationwide scale-up by 2016. Given that SMC is a relatively new approach, there is an urgent need to assess the costs and cost effectiveness of SMC when implemented through the routine health system to inform decisions on resource allocation., Methods: Cost data were collected from pilot implementation of SMC in Kita district, which targeted 77,497 children aged 3-59 months. Starting in August 2014, SMC was delivered by fixed point distribution in villages with the first dose observed each month. Treatment consisted of sulfadoxine-pyrimethamine and amodiaquine once a month for four consecutive months, or rounds. Economic and financial costs were collected from the provider perspective using an ingredients approach. Effectiveness estimates were based upon a published mathematical transmission model calibrated to local epidemiology, rainfall patterns and scale-up of interventions. Incremental cost effectiveness ratios were calculated for the cost per malaria episode averted, cost per disability adjusted life years (DALYs) averted, and cost per death averted., Results: The total economic cost of the intervention in the district of Kita was US $357,494. Drug costs and personnel costs accounted for 34% and 31%, respectively. Incentives (payment other than salary for efforts beyond routine activities) accounted for 25% of total implementation costs. Average financial and economic unit costs per child per round were US $0.73 and US $0.86, respectively; total annual financial and economic costs per child receiving SMC were US $2.92 and US $3.43, respectively. Accounting for coverage, the economic cost per child fully adherent (receiving all four rounds) was US $6.38 and US $4.69, if weighted highly adherent, (receiving 3 or 4 rounds of SMC). When costs were combined with modelled effects, the economic cost per malaria episode averted in children was US $4.26 (uncertainty bound 2.83-7.17), US $144 (135-153) per DALY averted and US $ 14,503 (13,604-15,402) per death averted., Conclusions: When implemented at fixed point distribution through the routine health system in Mali, SMC was highly cost-effective. As in previous SMC implementation studies, financial incentives were a large cost component.
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- 2021
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37. Preventive malaria treatment among school-aged children in sub-Saharan Africa: a systematic review and meta-analyses.
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Cohee LM, Opondo C, Clarke SE, Halliday KE, Cano J, Shipper AG, Barger-Kamate B, Djimde A, Diarra S, Dokras A, Kamya MR, Lutumba P, Ly AB, Nankabirwa JI, Njagi JK, Maiga H, Maiteki-Sebuguzi C, Matangila J, Okello G, Rohner F, Roschnik N, Rouhani S, Sissoko MS, Staedke SG, Thera MA, Turner EL, Van Geertruyden JP, Zimmerman MB, Jukes MCH, Brooker SJ, Allen E, Laufer MK, and Chico RM
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- Adolescent, Africa South of the Sahara epidemiology, Child, Child, Preschool, Humans, Malaria drug therapy, Antimalarials therapeutic use, Malaria epidemiology, Malaria prevention & control
- Abstract
Background: The burden of malaria infection in sub-Saharan Africa among school-aged children aged 5-15 years is underappreciated and represents an important source of human-to-mosquito transmission of Plasmodium falciparum. Additional interventions are needed to control and eliminate malaria. We aimed to assess whether preventive treatment of malaria might be an effective means of reducing P falciparum infection and anaemia in school-aged children and lowering parasite transmission., Methods: In this systematic review and two meta-analyses, we searched the online databases PubMed, Embase, Cochrane CENTRAL, and Clinicaltrials.gov for intervention studies published between Jan 1, 1990, and Dec 14, 2018. We included randomised studies that assessed the effect of antimalarial treatment among asymptomatic school-aged children aged 5-15 years in sub-Saharan Africa on prevalence of P falciparum infection and anaemia, clinical malaria, and cognitive function. We first extracted data for a study-level meta-analysis, then contacted research groups to request data for an individual participant data meta-analysis. Outcomes of interest included prevalence of P falciparum infection detected by microscopy, anaemia (study defined values or haemoglobin less than age-adjusted and sex-adjusted values), clinical malaria (infection and symptoms on the basis of study-specific definitions) during follow-up, and code transmission test scores. We assessed effects by treatment type and duration of time protected, and explored effect modification by transmission setting. For study-level meta-analysis, we calculated risk ratios for binary outcomes and standardised mean differences for continuous outcomes and pooled outcomes using fixed-effect and random-effects models. We used a hierarchical generalised linear model for meta-analysis of individual participant data. This study is registered with PROSPERO, CRD42016030197., Findings: Of 628 studies identified, 13 were eligible for the study-level meta-analysis (n=16 309). Researchers from 11 studies contributed data on at least one outcome (n=15 658) for an individual participant data meta-analysis. Interventions and study designs were highly heterogeneous; overall risk of bias was low. In the study-level meta-analysis, treatment was associated with reductions in P falciparum prevalence (risk ratio [RR] 0·27, 95% CI 0·17-0·44), anaemia (0·77, 0·65-0·91), and clinical malaria (0·40, 0·28-0·56); results for cognitive outcomes are not presented because data were only available for three trials. In our individual participant data meta-analysis, we found treatment significantly decreased P falciparum prevalence (adjusted RR [ARR] 0·46, 95% CI 0·40-0·53; p<0·0001; 15 648 individuals; 11 studies), anaemia (ARR 0·85, 0·77-0·92; p<0·0001; 15 026 individuals; 11 studies), and subsequent clinical malaria (ARR 0·50, 0·39-0·60; p<0·0001; 1815 individuals; four studies) across transmission settings. We detected a marginal effect on cognitive function in children older than 10 years (adjusted mean difference in standardised test scores 0·36, 0·01-0·71; p=0·044; 3962 individuals; five studies) although we found no significant effect when combined across all ages., Interpretation: Preventive treatment of malaria among school-aged children significantly decreases P falciparum prevalence, anaemia, and risk of subsequent clinical malaria across transmission settings. Policy makers and programme managers should consider preventive treatment of malaria to protect this age group and advance the goal of malaria elimination, while weighing these benefits against potential risks of chemoprevention., Funding: US National Institutes of Health and Burroughs Wellcome Fund/ASTMH Fellowship., (Copyright © 2020 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license. Published by Elsevier Ltd.. All rights reserved.)
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- 2020
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38. p.Arg72Pro polymorphism of P53 and breast cancer risk: a meta-analysis of case-control studies.
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Diakite B, Kassogue Y, Dolo G, Wang J, Neuschler E, Kassogue O, Keita ML, Traore CB, Kamate B, Dembele E, Nadifi S, Murphy RL, Doumbia S, Hou L, and Maiga M
- Subjects
- Alleles, Breast Neoplasms diagnosis, Case-Control Studies, Female, Gene Frequency, Genotype, Humans, Risk Factors, Amino Acid Substitution, Breast Neoplasms genetics, Genetic Predisposition to Disease genetics, Polymorphism, Single Nucleotide, Tumor Suppressor Protein p53 genetics
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Background: The effect of the p.Arg72Pro variant of the P53 gene on the risk of development ofbreast cancer remains variable in populations. However, the use ofstrategies such aspoolingage-matched controls with disease may provide a consistent meta-analysis. Our goal was to perform a meta-analysis in order to assess the association of p.Arg72Pro variant of P53 gene with the risk of breast cancer., Methods: Databases such as PubMed, Genetics Medical Literature, Harvard University Library, Web of Science and Genesis Library were used to search articles. Case-control studies with age-matched on breast cancer havingevaluated the genotype frequencies of the TP53 p.Arg72Pro polymorphism were selected. The fixed and random effects (Mantel-Haenszel) were calculated using pooled odds ratio of 95% CI to determine the risk of disease. Inconsistency was calculated to determine heterogeneity among the studies. The publication bias was estimated using the funnel plot., Results: Twenty-one publications with 7841 cases and 8876 controls were evaluated in this meta-analysis. Overall, our results suggested that TP53 p.Arg72Pro was associated with the risk of breast cancer for the dominant model (OR = 1.09, 95% CI = 1.02-1.16, P = 0.01) and the additive model (OR = 1.09, 95% CI = 1.01-1.17, P = 0.03), but not for the recessive model (OR = 1.07, 95% CI = 0.97-1.18, P = 0.19). According to the ethnic group analysis, Pro allele was associated with the risk of breast cancer in Caucasians for the dominant model and additive model (P = 0.02), and Africans for the recessive model and additive model (P = 0.03)., Conclusions: This meta-analysis found a significant association between TP53 p.Arg72Pro polymorphism and the risk of breast cancer. Individuals carrying at least one Pro allele were more likely to have breast cancer than individuals harboring the Arg allele.
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- 2020
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39. Prevalence and determinants of breast cancer screening in four sub-Saharan African countries: a population-based study.
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Ba DM, Ssentongo P, Agbese E, Yang Y, Cisse R, Diakite B, Traore CB, Kamate B, Kassogue Y, Dolo G, Dembele E, Diallo H, and Maiga M
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- Adolescent, Adult, Burkina Faso epidemiology, Cote d'Ivoire epidemiology, Cross-Sectional Studies, Female, Humans, Kenya epidemiology, Middle Aged, Namibia epidemiology, Prevalence, Young Adult, Breast Neoplasms diagnosis, Breast Neoplasms epidemiology, Early Detection of Cancer statistics & numerical data
- Abstract
Objectives: Breast cancer is the most prevalent cancer and the second leading cause of cancer-related deaths among women after cervical cancer in much of sub-Saharan Africa. This study aims to examine the prevalence and sociodemographic-socioeconomic factors associated with breast cancer screening among women of reproductive age in sub-Saharan Africa., Design: A weighted population-based cross-sectional study using Demographic and Health Surveys (DHS) data. We used all available data on breast cancer screening from the DHS for four sub-Saharan African countries (Burkina Faso, Ivory Coast, Kenya and Namibia). Breast cancer screening was the outcome of interest for this study. Multivariable Poisson regression was used to identify independent factors associated with breast cancer screening., Setting: Four countries participating in the DHS from 2010 to 2014 with data on breast cancer screening., Participants: Women of reproductive age 15-49 years (N=39 646)., Results: The overall prevalence of breast cancer screening was only 12.9% during the study period, ranging from 5.2% in Ivory Coast to 23.1% in Namibia. Factors associated with breast cancer screening were secondary/higher education with adjusted prevalence ratio (adjusted PR)=2.33 (95% CI: 2.05 to 2.66) compared with no education; older participants, 35-49 years (adjusted PR=1.73, 95% CI : 1.56 to 1.91) compared with younger participants 15-24 years; health insurance coverage (adjusted PR=1.57, 95% CI: 1.47 to 1.68) compared with those with no health insurance and highest socioeconomic status (adjusted PR=1.33, 95% CI : 1.19 to 1.49) compared with lowest socioeconomic status., Conclusion: Despite high breast cancer mortality rates in sub-Saharan Africa, the prevalence of breast cancer screening is substantially low and varies gradually across countries and in relation to factors such as education, age, health insurance coverage and household wealth index level. These results highlight the need for increased efforts to improve the uptake of breast cancer screening in sub-Saharan Africa., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2020
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40. Breast cancer pathology services in sub-Saharan Africa: a survey within population-based cancer registries.
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Ziegenhorn HV, Frie KG, Ekanem IO, Ebughe G, Kamate B, Traore C, Dzamalala C, Ogunbiyi O, Igbinoba F, Liu B, Bauer M, Thomssen C, Parkin DM, Wickenhauser C, and Kantelhardt EJ
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- Africa South of the Sahara epidemiology, Breast Neoplasms epidemiology, Female, Humans, Immunohistochemistry, Incidence, Registries, Surveys and Questionnaires, Breast Neoplasms pathology, Pathologists supply & distribution
- Abstract
Background: Pathologists face major challenges in breast cancer diagnostics in sub-Saharan Africa (SSA). The major problems identified as impairing the quality of pathology reports are shortcomings of equipment, organization and insufficiently qualified personnel. In addition, in the context of breast cancer, immunohistochemistry (IHC) needs to be available for the evaluation of biomarkers. In the study presented, we aim to describe the current state of breast cancer pathology in order to highlight the unmet needs., Methods: We obtained information on breast cancer pathology services within population-based cancer registries in SSA. A survey of 20 participating pathology centres was carried out. These centres represent large, rather well-equipped pathologies. The data obtained were related to the known population and breast cancer incidence of the registry areas., Results: The responding pathologists served populations of between 30,000 and 1.8 million and the centres surveyed dealt with 10-386 breast cancer cases per year. Time to fixation and formalin fixation time varied from overnight to more than 72 h. Only five centres processed core needle biopsies as a daily routine. Technical problems were common, with 14 centres reporting temporary power outages and 18 centres claiming to own faulty equipment with no access to technical support. Only half of the centres carried out IHC in their own laboratory. For three centres, IHC was only accessible outside of the country and one centre could not obtain any IHC results. A tumour board was established in 13 centres., Conclusions: We conclude that breast cancer pathology services ensuring state-of-the-art therapy are only available in a small fraction of centres in SSA. To overcome these limitations, many of the centres require larger numbers of experienced pathologists and technical staff. Furthermore, equipment maintenance, standardization of processing guidelines and establishment of an IHC service are needed to comply with international standards of breast cancer pathology.
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- 2020
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41. Association of PIN3 16-bp duplication polymorphism of TP53 with breast cancer risk in Mali and a meta-analysis.
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Diakite B, Kassogue Y, Dolo G, Kassogue O, Keita ML, Joyce B, Neuschler E, Wang J, Musa J, Traore CB, Kamate B, Dembele E, Nadifi S, Isichei M, Holl JL, Murphy R, Doumbia S, Hou L, and Maiga M
- Subjects
- Adult, Case-Control Studies, Female, Genetic Heterogeneity, Humans, Mali, Models, Genetic, Odds Ratio, Publication Bias, Risk Factors, Base Pairing genetics, Breast Neoplasms genetics, Genetic Association Studies, Genetic Predisposition to Disease, Polymorphism, Genetic, Tumor Suppressor Protein p53 genetics
- Abstract
Background: Breast cancer, the most common tumor in women in Mali and worldwide has been linked to several risk factors, including genetic factors, such as the PIN3 16-bp duplication polymorphism of TP53. The aim of our study was to evaluate the role of the PIN3 16-bp duplication polymorphism in the susceptibility to breast cancer in the Malian population and to perform a meta-analysis to better understand the correlation with data from other populations., Methods: We analyzed the PIN3 16-bp duplication polymorphism in blood samples of 60 Malian women with breast cancer and 60 healthy Malian women using PCR. In addition, we performed a meta-analysis of case-control study data from international databases, including Pubmed, Harvard University Library, Genetics Medical Literature Database, Genesis Library and Web of Science. Overall, odds ratio (OR) with 95% CI from fixed and random effects models were determined. Inconsistency was used to assess heterogeneity between studies and publication bias was estimated using the funnel plot., Results: In the studied Malian patients, a significant association of PIN3 16-bp duplication polymorphism with breast cancer risk was observed in dominant (A1A2 + A2A2 vs. A1A1: OR = 2.26, CI 95% = 1.08-4.73; P = 0.02) and additive (A2 vs. A1: OR = 1.87, CI 95% = 1.05-3.33; P = 0.03) models, but not in the recessive model (P = 0.38). In the meta-analysis, nineteen (19) articles were included with a total of 6018 disease cases and 4456 controls. Except for the dominant model (P = 0.15), an increased risk of breast cancer was detected with the recessive (OR = 1.46, 95% CI = 1.15-1.85; P = 0.002) and additive (OR = 1.11, 95% CI = 1.02-1.19; P = 0.01) models., Conclusion: The case-control study showed that PIN3 16-bp duplication polymorphism of TP53 is a significant risk factor for breast cancer in Malian women. These findings are supported by data from the meta-analysis carried out on different ethnic groups around the world.
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- 2020
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42. Breast cancer survival in sub-Saharan Africa by age, stage at diagnosis and human development index: A population-based registry study.
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Joko-Fru WY, Miranda-Filho A, Soerjomataram I, Egue M, Akele-Akpo MT, N'da G, Assefa M, Buziba N, Korir A, Kamate B, Traore C, Manraj S, Lorenzoni C, Carrilho C, Hansen R, Finesse A, Somdyala N, Wabinga H, Chingonzoh T, Borok M, Chokunonga E, Liu B, Kantelhardt E, McGale P, and Parkin DM
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- Africa South of the Sahara epidemiology, Age Factors, Breast pathology, Breast Neoplasms pathology, Female, Follow-Up Studies, Health Services Accessibility organization & administration, Health Services Accessibility statistics & numerical data, Humans, Kaplan-Meier Estimate, Middle Aged, Neoplasm Staging, Quality Improvement, Registries statistics & numerical data, Risk Assessment, Survival Rate, Breast Neoplasms mortality, Socioeconomic Factors
- Abstract
Breast cancer is the leading cancer diagnosis and second most common cause of cancer deaths in sub-Saharan Africa (SSA). Yet, there are few population-level survival data from Africa and none on the survival differences by stage at diagnosis. Here, we estimate breast cancer survival within SSA by area, stage and country-level human development index (HDI). We obtained data on a random sample of 2,588 breast cancer incident cases, diagnosed in 2008-2015 from 14 population-based cancer registries in 12 countries (Benin, Cote d'Ivoire, Ethiopia, Kenya, Mali, Mauritius, Mozambique, Namibia, Seychelles, South Africa, Uganda and Zimbabwe) through the African Cancer Registry Network. Of these, 2,311 were included for survival analyses. The 1-, 3- and 5-year observed and relative survival (RS) were estimated by registry, stage and country-level HDI. We equally estimated the excess hazards adjusting for potential confounders. Among patients with known stage, 64.9% were diagnosed in late stages, with 18.4% being metastatic at diagnosis. The RS varied by registry, ranging from 21.6%(8.2-39.8) at Year 3 in Bulawayo to 84.5% (70.6-93.5) in Namibia. Patients diagnosed at early stages had a 3-year RS of 78% (71.6-83.3) in contrast to 40.3% (34.9-45.7) at advanced stages (III and IV). The overall RS at Year 1 was 86.1% (84.4-87.6), 65.8% (63.5-68.1) at Year 3 and 59.0% (56.3-61.6) at Year 5. Age at diagnosis was not independently associated with increased mortality risk after adjusting for the effect of stage and country-level HDI. In conclusion, downstaging breast cancer at diagnosis and improving access to quality care could be pivotal in improving breast cancer survival outcomes in Africa., (© 2019 The Authors. International Journal of Cancer published by John Wiley & Sons Ltd on behalf of UICC.)
- Published
- 2020
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43. Why Do Women with Breast Cancer Get Diagnosed and Treated Late in Sub-Saharan Africa? Perspectives from Women and Patients in Bamako, Mali.
- Author
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Grosse Frie K, Samoura H, Diop S, Kamate B, Traore CB, Malle B, Coulibaly B, and Kantelhardt EJ
- Abstract
Background: Breast cancer, the most common cancer among women worldwide, has a high mortality rate in low-income countries. In sub-Saharan Africa, most breast cancer patients are diagnosed with advanced disease. Some studies have quantified the time delay to diagnosis in sub-Saharan Africa, but very few have used qualitative methods to understand barriers leading to delay. This study analyses barriers throughout a breast cancer patient's pathway from symptom recognition to treatment in Mali., Method: Three focus group discussions were conducted. The model of pathways to treatment was used to structure the results into 4 time intervals: appraisal, help-seeking, diagnosis, and treatment, with a focus on barriers during each interval., Results: The main barriers during the appraisal interval were a low level of breast cancer knowledge among women, their families, and medical professionals, and during the help-seeking interval, mistrust in the community health care centers and economic hardship. Barriers during the diagnosis interval were low quality of health care services and lack of social support, and during the pretreatment interval high costs and lack of specialized services., Conclusion: Multilevel interventions are needed to ensure access, availability, and affordability of a minimum standard of care for breast cancer patients in sub-Saharan Africa.
- Published
- 2018
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44. Temporal dynamic of malaria in a suburban area along the Niger River.
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Sissoko MS, Sissoko K, Kamate B, Samake Y, Goita S, Dabo A, Yena M, Dessay N, Piarroux R, Doumbo OK, and Gaudart J
- Subjects
- Humans, Hydrology, Incidence, Malaria parasitology, Mali epidemiology, Rivers, Seasons, Environment, Malaria epidemiology, Meteorological Concepts, Urbanization, Water Cycle
- Abstract
Background: Even if rainfall and temperature are factors classically associated to malaria, little is known about other meteorological factors, their variability and combinations related to malaria, in association with river height variations. Furthermore, in suburban area, urbanization and growing population density should be assessed in relation to these environmental factors. The aim of this study was to assess the impact of combined environmental, meteorological and hydrological factors on malaria incidence through time in the context of urbanization., Methods: Population observational data were prospectively collected. Clinical malaria was defined as the presence of parasites in addition to clinical symptoms. Meteorological and hydrological factors were measured daily. For each factors variation indices were estimated. Urbanization was yearly estimated assessing satellite imaging and field investigations. Principal component analysis was used for dimension reduction and factors combination. Lags between malaria incidences and the main components were assessed by cross-correlation functions. Generalized additive model was used to assess relative impact of different environmental components, taking into account lags, and modelling non-linear relationships. Change-point analysis was used to determine transmission periods within years., Results: Malaria incidences were dominated by annual periodicity and varied through time without modification of the dynamic, with no impact of the urbanization. The main meteorological factor associated with malaria was a combination of evaporation, humidity and rainfall, with a lag of 3 months. The relationship between combined temperature factors showed a linear impact until reaching high temperatures limiting malaria incidence, with a lag 3.25 months. Height and variation of the river were related to malaria incidence (respectively 6 week lag and no lag)., Conclusions: The study emphasizes no decreasing trend of malaria incidence despite accurate access to care and control strategies in accordance to international recommendations. Furthermore, no decreasing trend was showed despite the urbanization of the area. Malaria transmission remain increase 3 months after the beginning of the dry season. Addition to evaporation versus humidity/rainfall, nonlinear relationship for temperature and river height and variations have to be taken into account when implementing malaria control programmes.
- Published
- 2017
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45. Measuring the impact of seasonal malaria chemoprevention as part of routine malaria control in Kita, Mali.
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Diawara F, Steinhardt LC, Mahamar A, Traore T, Kone DT, Diawara H, Kamate B, Kone D, Diallo M, Sadou A, Mihigo J, Sagara I, Djimde AA, Eckert E, and Dicko A
- Subjects
- Amodiaquine therapeutic use, Anemia epidemiology, Child, Child, Preschool, Cross-Sectional Studies, Drug Combinations, Female, Humans, Infant, Malaria drug therapy, Male, Mali epidemiology, Prevalence, Seasons, Sulfadoxine therapeutic use, Antimalarials therapeutic use, Chemoprevention standards, Chemoprevention statistics & numerical data, Malaria epidemiology, Malaria prevention & control
- Abstract
Background: Seasonal malaria chemoprevention (SMC) is a new strategy recommended by WHO in areas of highly seasonal transmission in March 2012. Although randomized controlled trials (RCTs) have shown SMC to be highly effective, evidence and experience from routine implementation of SMC are limited., Methods: A non-randomized pragmatic trial with pre-post design was used, with one intervention district (Kita), where four rounds of SMC with sulfadoxine + amodiaquine (SP + AQ) took place in August-November 2014, and one comparison district (Bafoulabe). The primary aims were to evaluate SMC coverage and reductions in prevalence of malaria and anaemia when SMC is delivered through routine programmes using existing community health workers. Children aged 3-59 months from 15 selected localities per district, sampled with probability proportional to size, were surveyed and blood samples collected for malaria blood smears, haemoglobin (Hb) measurement, and molecular markers of drug resistance in two cross-sectional surveys, one before SMC (July 2014) and one after SMC (December 2014). Difference-in-differences regression models were used to assess and compare changes in malaria and anaemia in the intervention and comparison districts. Adherence and tolerability of SMC were assessed by cross-sectional surveys 4-7 days after each SMC round. Coverage of SMC was assessed in the post-SMC survey., Results: During round 1, 84% of targeted children received at least the first SMC dose, but coverage declined to 67% by round 4. Across the four treatment rounds, 54% of children received four complete SMC courses. Prevalence of parasitaemia was similar in intervention and comparison districts prior to SMC (23.4 vs 29.5%, p = 0.34) as was the prevalence of malaria illness (2.4 vs 1.9%, p = 0.75). After SMC, parasitaemia prevalence fell to 18% in the intervention district and increased to 46% in the comparison district [difference-in-differences (DD) OR = 0.35; 95% CI 0.20-0.60]. Prevalence of malaria illness fell to a greater degree in the intervention district versus the comparison district (DD OR = 0.20; 95% CI 0.04-0.94) and the same for moderate anaemia (Hb < 8 g/dL) (DD OR = 0.26, 95% CI 0.11-0.65). The frequency of the quintuple mutation (dhfr N51I, C59R and S108N + dhps A437G and K540E) remained low (5%) before and after intervention in both districts., Conclusions: Routine implementation of SMC in Mali substantially reduced malaria and anaemia, with reductions of similar magnitude to those seen in previous RCTs. Improving coverage could further strengthen SMC impact. Trial registration clinical trial registration number NCT02894294.
- Published
- 2017
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46. Standardized Interpretation of Chest Radiographs in Cases of Pediatric Pneumonia From the PERCH Study.
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Fancourt N, Deloria Knoll M, Barger-Kamate B, de Campo J, de Campo M, Diallo M, Ebruke BE, Feikin DR, Gleeson F, Gong W, Hammitt LL, Izadnegahdar R, Kruatrachue A, Madhi SA, Manduku V, Matin FB, Mahomed N, Moore DP, Mwenechanya M, Nahar K, Oluwalana C, Ominde MS, Prosperi C, Sande J, Suntarattiwong P, and O'Brien KL
- Subjects
- Child, Preschool, Female, Hospitalization, Humans, Infant, Male, Pneumonia diagnosis, Pneumonia epidemiology, Reference Standards, World Health Organization, Pneumonia diagnostic imaging, Pneumonia etiology, Radiography, Thoracic standards
- Abstract
Background.: Chest radiographs (CXRs) are a valuable diagnostic tool in epidemiologic studies of pneumonia. The World Health Organization (WHO) methodology for the interpretation of pediatric CXRs has not been evaluated beyond its intended application as an endpoint measure for bacterial vaccine trials., Methods.: The Pneumonia Etiology Research for Child Health (PERCH) study enrolled children aged 1-59 months hospitalized with WHO-defined severe and very severe pneumonia from 7 low- and middle-income countries. An interpretation process categorized each CXR into 1 of 5 conclusions: consolidation, other infiltrate, both consolidation and other infiltrate, normal, or uninterpretable. Two members of a 14-person reading panel, who had undertaken training and standardization in CXR interpretation, interpreted each CXR. Two members of an arbitration panel provided additional independent reviews of CXRs with discordant interpretations at the primary reading, blinded to previous reports. Further discordance was resolved with consensus discussion., Results.: A total of 4172 CXRs were obtained from 4232 cases. Observed agreement for detecting consolidation (with or without other infiltrate) between primary readers was 78% (κ = 0.50) and between arbitrators was 84% (κ = 0.61); agreement for primary readers and arbitrators across 5 conclusion categories was 43.5% (κ = 0.25) and 48.5% (κ = 0.32), respectively. Disagreement was most frequent between conclusions of other infiltrate and normal for both the reading panel and the arbitration panel (32% and 30% of discordant CXRs, respectively)., Conclusions.: Agreement was similar to that of previous evaluations using the WHO methodology for detecting consolidation, but poor for other infiltrates despite attempts at a rigorous standardization process., (© The Author 2017. Published by Oxford University Press for the Infectious Diseases Society of America.)
- Published
- 2017
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47. Chest Radiograph Findings in Childhood Pneumonia Cases From the Multisite PERCH Study.
- Author
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Fancourt N, Deloria Knoll M, Baggett HC, Brooks WA, Feikin DR, Hammitt LL, Howie SRC, Kotloff KL, Levine OS, Madhi SA, Murdoch DR, Scott JAG, Thea DM, Awori JO, Barger-Kamate B, Chipeta J, DeLuca AN, Diallo M, Driscoll AJ, Ebruke BE, Higdon MM, Jahan Y, Karron RA, Mahomed N, Moore DP, Nahar K, Naorat S, Ominde MS, Park DE, Prosperi C, Wa Somwe S, Thamthitiwat S, Zaman SMA, Zeger SL, and O'Brien KL
- Subjects
- Australia, Bangladesh, Child Health, Child, Preschool, Female, Gambia, Humans, Infant, Infant, Newborn, Internationality, Kenya, Male, Mali, Pneumonia epidemiology, Pneumonia mortality, Pneumonia, Bacterial diagnostic imaging, Pneumonia, Bacterial epidemiology, Pneumonia, Viral diagnostic imaging, Pneumonia, Viral epidemiology, South Africa, Thailand, World Health Organization, Zambia, Pneumonia diagnostic imaging, Pneumonia etiology, Radiography, Thoracic
- Abstract
Background.: Chest radiographs (CXRs) are frequently used to assess pneumonia cases. Variations in CXR appearances between epidemiological settings and their correlation with clinical signs are not well documented., Methods.: The Pneumonia Etiology Research for Child Health project enrolled 4232 cases of hospitalized World Health Organization (WHO)-defined severe and very severe pneumonia from 9 sites in 7 countries (Bangladesh, the Gambia, Kenya, Mali, South Africa, Thailand, and Zambia). At admission, each case underwent a standardized assessment of clinical signs and pneumonia risk factors by trained health personnel, and a CXR was taken that was interpreted using the standardized WHO methodology. CXRs were categorized as abnormal (consolidation and/or other infiltrate), normal, or uninterpretable., Results.: CXRs were interpretable in 3587 (85%) cases, of which 1935 (54%) were abnormal (site range, 35%-64%). Cases with abnormal CXRs were more likely than those with normal CXRs to have hypoxemia (45% vs 26%), crackles (69% vs 62%), tachypnea (85% vs 80%), or fever (20% vs 16%) and less likely to have wheeze (30% vs 38%; all P < .05). CXR consolidation was associated with a higher case fatality ratio at 30-day follow-up (13.5%) compared to other infiltrate (4.7%) or normal (4.9%) CXRs., Conclusions.: Clinically diagnosed pneumonia cases with abnormal CXRs were more likely to have signs typically associated with pneumonia. However, CXR-normal cases were common, and clinical signs considered indicative of pneumonia were present in substantial proportions of these cases. CXR-consolidation cases represent a group with an increased likelihood of death at 30 days post-discharge., (© The Author 2017. Published by Oxford University Press for the Infectious Diseases Society of America.)
- Published
- 2017
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48. Safety and efficacy of PfSPZ Vaccine against Plasmodium falciparum via direct venous inoculation in healthy malaria-exposed adults in Mali: a randomised, double-blind phase 1 trial.
- Author
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Sissoko MS, Healy SA, Katile A, Omaswa F, Zaidi I, Gabriel EE, Kamate B, Samake Y, Guindo MA, Dolo A, Niangaly A, Niaré K, Zeguime A, Sissoko K, Diallo H, Thera I, Ding K, Fay MP, O'Connell EM, Nutman TB, Wong-Madden S, Murshedkar T, Ruben AJ, Li M, Abebe Y, Manoj A, Gunasekera A, Chakravarty S, Sim BKL, Billingsley PF, James ER, Walther M, Richie TL, Hoffman SL, Doumbo O, and Duffy PE
- Subjects
- Adolescent, Adult, Antimalarials administration & dosage, Antimalarials therapeutic use, Artemether, Artemisinins administration & dosage, Artemisinins therapeutic use, Double-Blind Method, Ethanolamines administration & dosage, Ethanolamines therapeutic use, Female, Fluorenes administration & dosage, Fluorenes therapeutic use, Humans, Lumefantrine, Male, Mali, Immunization Schedule, Malaria, Falciparum prevention & control, Plasmodium falciparum immunology, Vaccination methods
- Abstract
Background: Plasmodium falciparum sporozite (PfSPZ) Vaccine is a metabolically active, non-replicating, whole malaria sporozoite vaccine that has been reported to be safe and protective against P falciparum controlled human malaria infection in malaria-naive individuals. We aimed to assess the safety and protective efficacy of PfSPZ Vaccine against naturally acquired P falciparum in malaria-experienced adults in Mali., Methods: After an open-label dose-escalation study in a pilot safety cohort, we did a double-blind, randomised, placebo-controlled trial based in Donéguébougou and surrounding villages in Mali. We recruited 18-35-year-old healthy adults who were randomly assigned (1:1) in a double-blind manner, with stratification by village and block randomisation, to receive either five doses of 2·7 × 10
5 PfSPZ or normal saline at days 0, 28, 56, 84, and 140 during the dry season (January to July inclusive). Participants and investigators were masked to group assignments, which were unmasked at the final study visit, 6 months after receipt of the last vaccination. Participants received combined artemether and lumefantrine (four tablets, each containing 20 mg artemether and 120 mg lumefantrine, given twice per day over 3 days for a total of six doses) to eliminate P falciparum before the first and last vaccinations. We collected blood smears every 2 weeks and during any illness for 24 weeks after the fifth vaccination. The primary outcome was the safety and tolerability of the vaccine, assessed as local and systemic reactogenicity and adverse events. The sample size was calculated for the exploratory efficacy endpoint of time to first P falciparum infection beginning 28 days after the fifth vaccination. The safety analysis included all participants who received at least one dose of investigational product, whereas the efficacy analyses included only participants who received all five vaccinations. This trial is registered at ClinicalTrials.gov, number NCT01988636., Findings: Between Jan 18 and Feb 24, 2014, we enrolled 93 participants into the main study cohort with 46 participants assigned PfSPZ Vaccine and 47 assigned placebo, all of whom were evaluable for safety. We detected no significant differences in local or systemic adverse events or laboratory abnormalities between the PfSPZ Vaccine and placebo groups, and only grade 1 (mild) local or systemic adverse events occurred in both groups. The most common solicited systemic adverse event in the vaccine and placebo groups was headache (three [7%] people in the vaccine group vs four [9%] in the placebo group) followed by fatigue (one [2%] person in the placebo group), fever (one [2%] person in the placebo group), and myalgia (one [2%] person in each group). The exploratory efficacy analysis included 41 participants from the vaccine group and 40 from the placebo group. Of these participants, 37 (93%) from the placebo group and 27 (66%) from the vaccine group developed P falciparum infection. The hazard ratio for vaccine efficacy was 0·517 (95% CI 0·313-0·856) by time-to-infection analysis (log-rank p=0·01), and 0·712 (0·528-0·918) by proportional analysis (p=0·006)., Interpretation: PfSPZ Vaccine was well tolerated and safe. PfSPZ Vaccine showed significant protection in African adults against P falciparum infection throughout an entire malaria season., Funding: US National Institutes of Health Intramural Research Program, Sanaria., (Copyright © 2017 Elsevier Ltd. All rights reserved.)- Published
- 2017
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49. Pertussis-Associated Pneumonia in Infants and Children From Low- and Middle-Income Countries Participating in the PERCH Study.
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Barger-Kamate B, Deloria Knoll M, Kagucia EW, Prosperi C, Baggett HC, Brooks WA, Feikin DR, Hammitt LL, Howie SR, Levine OS, Madhi SA, Scott JA, Thea DM, Amornintapichet T, Anderson TP, Awori JO, Baillie VL, Chipeta J, DeLuca AN, Driscoll AJ, Goswami D, Higdon MM, Hossain L, Karron RA, Maloney S, Moore DP, Morpeth SC, Mwananyanda L, Ofordile O, Olutunde E, Park DE, Sow SO, Tapia MD, Murdoch DR, O'Brien KL, and Kotloff KL
- Subjects
- Bordetella pertussis genetics, Case-Control Studies, Coinfection, Developing Countries, Female, HIV Infections, Hospitalization, Humans, Infant, Infant, Newborn, Male, Mortality, Odds Ratio, Pneumonia diagnosis, Population Surveillance, Risk Factors, Symptom Assessment, Vaccination, Whooping Cough prevention & control, Pneumonia epidemiology, Pneumonia etiology, Whooping Cough complications, Whooping Cough epidemiology
- Abstract
Background: Few data exist describing pertussis epidemiology among infants and children in low- and middle-income countries to guide preventive strategies., Methods: Children 1-59 months of age hospitalized with World Health Organization-defined severe or very severe pneumonia in 7 African and Asian countries and similarly aged community controls were enrolled in the Pneumonia Etiology Research for Child Health study. They underwent a standardized clinical evaluation and provided nasopharyngeal and oropharyngeal swabs and induced sputum (cases only) for Bordetella pertussis polymerase chain reaction. Risk factors and pertussis-associated clinical findings were identified., Results: Bordetella pertussis was detected in 53 of 4200 (1.3%) cases and 11 of 5196 (0.2%) controls. In the age stratum 1-5 months, 40 (2.3% of 1721) cases were positive, all from African sites, as were 8 (0.5% of 1617) controls. Pertussis-positive African cases 1-5 months old, compared to controls, were more often human immunodeficiency virus (HIV) uninfected-exposed (adjusted odds ratio [aOR], 2.2), unvaccinated (aOR, 3.7), underweight (aOR, 6.3), and too young to be immunized (aOR, 16.1) (all P ≤ .05). Compared with pertussis-negative African cases in this age group, pertussis-positive cases were younger, more likely to vomit (aOR, 2.6), to cough ≥14 days (aOR, 6.3), to have leukocyte counts >20 000 cells/µL (aOR, 4.6), and to have lymphocyte counts >10 000 cells/µL (aOR, 7.2) (all P ≤ .05). The case fatality ratio of pertussis-infected pneumonia cases 1-5 months of age was 12.5% (95% confidence interval, 4.2%-26.8%; 5/40); pertussis was identified in 3.7% of 137 in-hospital deaths among African cases in this age group., Conclusions: In the postneonatal period, pertussis causes a small fraction of hospitalized pneumonia cases and deaths; however, case fatality is substantial. The propensity to infect unvaccinated infants and those at risk for insufficient immunity (too young to be vaccinated, premature, HIV-infected/exposed) suggests that the role for maternal vaccination should be considered along with efforts to reduce exposure to risk factors and to optimize childhood pertussis vaccination coverage., (© The Author 2016. Published by Oxford University Press for the Infectious Diseases Society of America.)
- Published
- 2016
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50. Effect of artemether-lumefantrine (Coartem) on cytomegalovirus urine viral load during and following treatment for malaria in children.
- Author
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Barger-Kamate B, Forman M, Sangare CO, Haidara AS, Maiga H, Vaidya D, Djimde A, and Arav-Boger R
- Subjects
- Artemether, Lumefantrine Drug Combination, Child, Child, Preschool, Cytomegalovirus, Cytomegalovirus Infections diagnosis, Drug Combinations, Female, Follow-Up Studies, Humans, Infant, Malaria diagnosis, Malaria parasitology, Male, Parasite Load, Treatment Outcome, Virus Shedding, Artemisinins therapeutic use, Coinfection, Cytomegalovirus Infections virology, Ethanolamines therapeutic use, Fluorenes therapeutic use, Malaria drug therapy, Viral Load
- Abstract
Background: Artemisinins, commonly used to treat malaria, have shown activity against cytomegalovirus (CMV) in vitro, in an animal model, and in case reports; however, the in vivo anti-CMV activity has not been well investigated., Objectives: To evaluate whether artemisinins affect CMV shedding among subjects co-infected with CMV and malaria., Study Design: A prospective observational study of children in Mali (6 month-10 year) presenting with fever. Urine samples were collected at day 0, 3, and 14 from children treated with artemether-lumefantrine (Coartem(®)) for malaria and those who had other illnesses not treated with Coartem. CMV DNA was quantified using a real-time PCR. Resulting urine viral loads were compared between the groups at three time points., Results: 164 malaria cases and 143 non-malaria comparisons were enrolled. Eighty-one (49%) cases and 88 (62%) comparisons shed CMV at day 0. Day 0 and day 3 viral loads were similar, but at day 14 the median viral load of cases was lower than that of comparisons (360 vs 720 copies/mL or 2.56 vs 2.86 log10), p=0.059. A stratified analysis of day 0 high viral shedders (defined as >1000 copies/mL) showed significantly lower median viral load at day 14 among cases (490 copies/mL, 2.69 log10) vs comparisons (1200 copies/mL, 3.08 log10), p=0.045., Conclusion: A high rate of urinary CMV shedding was found in a malaria-endemic area. Among high virus shedders artemether-lumefantrine decreased urine viral load, but the effect was not observed when analysis of both high and low shedders was performed. These results support additional studies of artemisinin dosing and duration in CMV infection., (Copyright © 2016 Elsevier B.V. All rights reserved.)
- Published
- 2016
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