101 results on '"Mallewa M"'
Search Results
2. Evaluation of impact of continuous KMC initiated immediately after birth compared to KMC initiated after stabilization, in newborns with birth weight 1.0 to <1.8 kg on neurodevelopmental outcomes: protocol for a follow-up study
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Adejuyigbe, EA, primary, Agyeman, I, additional, Anand, P, additional, Anyabolu, HC, additional, Arya, S, additional, Assenga, EN, additional, Badhal, S, additional, Brobby, NW, additional, Chellani, HK, additional, Chopra, N, additional, Debata, PK, additional, Dube, Q, additional, Dua, T, additional, Gadama, L, additional, Gera, R, additional, Hammond, CK, additional, Jain, S, additional, Kantumbiza, F, additional, Kawaza, K, additional, Kija, EN, additional, Lal, P, additional, Mallewa, M, additional, Manu, MK, additional, Mehta, A, additional, Mhango, T, additional, Naburi, HE, additional, Newton, S, additional, Nyanor, I, additional, Nyarko, PA, additional, Oke, OJ, additional, Patel, A, additional, Phlange-Rhule, G, additional, Sehgal, R, additional, Singhal, R, additional, Wadhwa, N, additional, and Yiadom, AB, additional
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- 2022
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3. Transfusion Volume for Children with Severe Anemia in Africa
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Maitland, K, Saunders, D, Olupot-Olupot, P, Kiguli, S, Chagaluka, G, Alaroker, F, Opoka, OR, Mpoya, A, Engoru, C, Nteziyaremye, J, Mallewa, M, Kennedy, N, Nakuya, M, Namayanja, C, Kayaga, J, Uyoga, S, Byabazaire, D, M’baya, B, Wabwire, B, Frost, G, Bates, I, Evans, JA, Williams, TN, Goncalves, P, George, EC, Gibb, DM, Walker, AS, Group, for the TRACT, Medical Research Council, Medical Research Council, UK, and Medical Research Council (MRC)
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Male ,Malawi ,Pediatrics ,Blood transfusion ,Cost-Benefit Analysis ,medicine.medical_treatment ,030204 cardiovascular system & hematology ,Transfusion volume ,TRACT Group ,Hemoglobins ,0302 clinical medicine ,Uganda ,030212 general & internal medicine ,Child ,11 Medical and Health Sciences ,wh_155 ,Anemia ,Health Care Costs ,General Medicine ,ws_300 ,Child, Preschool ,Hospital admission ,Female ,Life Sciences & Biomedicine ,medicine.medical_specialty ,Fever ,Patient Readmission ,World health ,Severe anemia ,wb_356 ,03 medical and health sciences ,Medicine, General & Internal ,SDG 3 - Good Health and Well-being ,General & Internal Medicine ,parasitic diseases ,medicine ,Humans ,Blood Transfusion ,Science & Technology ,business.industry ,Infant ,Transfusion Reaction ,Length of Stay ,medicine.disease ,Malaria ,Hemoglobin ,business ,Follow-Up Studies - Abstract
Background: Severe anemia (hemoglobin level, Methods: In this factorial, open-label trial, we randomly assigned Ugandan and Malawian children 2 months to 12 years of age with a hemoglobin level of less than 6 g per deciliter and severity features (e.g., respiratory distress or reduced consciousness) to receive immediate blood transfusion with 20 ml per kilogram or 30 ml per kilogram. Three other randomized analyses investigated immediate as compared with no immediate transfusion, the administration of postdischarge micronutrients, and postdischarge prophylaxis with trimethoprim–sulfamethoxazole. The primary outcome was 28-day mortality.Results: A total of 3196 eligible children (median age, 37 months; 2050 [64.1%] with malaria) were assigned to receive a transfusion of 30 ml per kilogram (1598 children) or 20 ml per kilogram (1598 children) and were followed for 180 days. A total of 1592 children (99.6%) in the higher-volume group and 1596 (99.9%) in the lower-volume group started transfusion (median, 1.2 hours after randomization). The mean (±SD) volume of total blood transfused per child was 475±385 ml and 353±348 ml, respectively; 197 children (12.3%) and 300 children (18.8%) in the respective groups received additional transfusions. Overall, 55 children (3.4%) in the higher-volume group and 72 (4.5%) in the lower-volume group died before 28 days (hazard ratio, 0.76; 95% confidence interval [CI], 0.54 to 1.08; P=0.12 by log-rank test). This finding masked significant heterogeneity in 28-day mortality according to the presence or absence of fever (>37.5°C) at screening (P=0.001 after Sidak correction). Among the 1943 children (60.8%) without fever, mortality was lower with a transfusion volume of 30 ml per kilogram than with a volume of 20 ml per kilogram (hazard ratio, 0.43; 95% CI, 0.27 to 0.69). Among the 1253 children (39.2%) with fever, mortality was higher with 30 ml per kilogram than with 20 ml per kilogram (hazard ratio, 1.91; 95% CI, 1.04 to 3.49). There was no evidence of differences between the randomized groups in readmissions, serious adverse events, or hemoglobin recovery at 180 days.Conclusions: Overall mortality did not differ between the two transfusion strategies. (Funded by the Medical Research Council and Department for International Development, United Kingdom; TRACT Current Controlled Trials number, ISRCTN84086586.)
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- 2019
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4. Haematological quality and age of donor blood issued for paediatric transfusion to four hospitals in sub‐Saharan Africa
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Uyoga, S, Mpoya, A, Olupot-Olupot, P, Kiguli, S, Opoka, R, Engoru, C, Mallewa, M, Kennedy, N, M'Biya, B, Kyeyune, D, Wabwire, B, Bates, I, Gibb, DM, Walker, AS, George, E, Williams, T, Maitland, K, Medical Research Council (MRC), Medical Research Council, Wellcome Trust, MRC Australia, Engineering & Physical Science Research Council (EPSRC), and Imperial College London
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Quality Control ,haematocrit ,Malawi ,Quality Assurance, Health Care ,Blood Donors ,Pediatrics ,Specimen Handling ,Hemoglobins ,donor blood pack ,Refrigeration ,Humans ,Transfusion Medicine and New Therapies ,Blood Transfusion ,Uganda ,Child ,blood transfusion services ,Randomized Controlled Trials as Topic ,Original Paper ,anaemia ,Science & Technology ,Reproducibility of Results ,1103 Clinical Sciences ,Anemia ,Hematology ,haemoglobin ,Hospitals ,Cardiovascular System & Hematology ,Hematocrit ,CELLS ,Blood Banks ,Corrigendum ,Life Sciences & Biomedicine - Abstract
Background and Objectives Paediatric blood transfusion for severe anaemia in hospitals in sub‐Saharan Africa remains common. Yet, reports describing the haematological quality of donor blood or storage duration in routine practice are very limited. Both factors are likely to affect transfusion outcomes. Materials and Methods We undertook three audits examining the distribution of pack types, haematological quality and storage duration of donor blood used in a paediatric clinical trial of blood at four hospitals in Africa (Uganda and Malawi). Results The overall distribution of whole blood, packed cells (plasma‐reduced by centrifugation) and red cell concentrates (RCC) (plasma‐reduced by gravity‐dependent sedimentation) used in a randomised trial was 40·7% (N = 1215), 22·4% (N = 669) and 36·8% (N = 1099), respectively. The first audit found similar median haematocrits of 57·0% (50·0,74·0), 64·0% (52·0,72·5; P = 0·238 vs. whole blood) and 56·0% (48·0,67·0; P = 0·462) in whole blood, RCC and packed cells, respectively, which resulted from unclear pack labelling by blood transfusion services (BTS). Re‐training of the BTS, hospital blood banks and clinical teams led to, in subsequent audits, significant differences in median haematocrit and haemoglobins across the three pack types and values within expected ranges. Median storage duration time was 12 days (IQR: 6, 19) with 18·2% (537/2964) over 21 days in storage. Initially, 9 (2·8%) packs were issued past the recommended duration of storage, dropping to 0·3% (N = 7) in the third audit post‐training. Conclusion The study highlights the importance of close interactions and education between BTS and clinical services and the importance of haemovigilance to ensure safe transfusion practice.
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- 2019
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5. Incidence and predictors of hospital readmission in children presenting with severe anaemia in Uganda and Malawi: a secondary analysis of TRACT trial data
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Connon, Roisin, George, Elizabeth C., Olupot-Olupot, Peter, Kiguli, Sarah, Chagaluka, George, Alaroker, Florence, Opoka, Robert O., Mpoya, Ayub, Walsh, Kevin, Engoru, Charles, Nteziyaremye, Julius, Mallewa, Macpherson, Kennedy, Neil, Nakuya, Margaret, Namayanja, Cate, Nabawanuka, Eva, Sennyondo, Tonny, Amorut, Denis, Williams Musika, C., Bates, Imelda, Boele van Hensbroek, M., Evans, Jennifer A., Uyoga, Sophie, Williams, Thomas N., Frost, Gary, Gibb, Diana M., Maitland, Kathryn, Walker, A. Sarah, Kiguli, S., Opoka, R. O., Nabawanuka, E., Kayaga, J., Kadama, E., Mbwali, I., Nuwabaine, L., Nakikwaku, R., Nsubuga, J., Mpande, K., Adoo, R., Ouma, O., Adia, N. K., Olupot-Olupot, P., Nteziyaremye, J., Namanyanga, C., Passi, G., Sennyondo, T., Adong, R., Okalebo, C. B., Atimango, E., Mwamula, S., Kapsindet, J., Muhindo, G. Kiluli R., Thembo, G. Masifa N., Odong, G., Engoru, C., Aloroker, F., Nakuya, M., Amorut, D., Ariima, M., Itipe, M., Atim, M. G., Abeno, M., Amede, B., Olupot, M., Okwi, S., Kulume, M. G., Among, G., Onyas, P., Achipa, E. D., Maitland, K., Mpoya, A., Maitha, P., Uyoga, S., Williams, T. N., Macharia, A., Mallewa, M., Chagaluka, G., Chimalizeni, Y., Kennedy, N., Kumwenda, F., Nkosi, E., Sochera, T., Malenga, A., Gushu, B., Phiri, T., Chisale, A., Mitole, N., Chokani, E., Munthali, A., Frost, G., Walsheto, K., Gibb, D. M., George, E. C., Thomason, M., Baptiste, D., McCabe, L., Walker, A. S., Ali, A., Khamis, K., Madula, M., Abongo, G., Heydermann, R., Bates, I., Urban, B., Kyomuhendo, F., Nakalanzi, S., Chabuka, J., Mkandawire, N., Evans, J. A., Fitzgerald, F., Molyneux, E., Murphy, I. Lubega M., Kazembe, P., Crawley, J., Peto, T., Musoke, P., Todd, J., Mirembe, G., and Tenu, F.
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wh_155 ,ws_300 ,wa_395 ,wa_320 - Abstract
Background: Severe anaemia (haemoglobin < 6 g/dL) is a leading cause of recurrent hospitalisation in African children. We investigated predictors of readmission in children hospitalised with severe anaemia in the TRACT trial (ISRCTN84086586) in order to identify potential future interventions.\ud Methods: Secondary analyses of the trial examined 3894 children from Uganda and Malawi surviving a hospital episode of severe anaemia. Predictors of all-cause readmission within 180 days of discharge were identified using multivariable regression with death as a competing risk. Groups of children with similar characteristics were identified using hierarchical clustering.\ud Results: Of the 3894 survivors 682 (18%) were readmitted; 403 (10%) had ≥2 re-admissions over 180 days. Three main causes of readmission were identified: severe anaemia (n = 456), malaria (n = 252) and haemoglobinuria/dark urine syndrome (n = 165). Overall, factors increasing risk of readmission included HIV-infection (hazard ratio 2.48\ud (95% CI 1.63–3.78), p < 0.001); ≥2 hospital admissions in the preceding 12 months (1.44(1.19–1.74), p < 0.001); history of transfusion (1.48(1.13–1.93), p = 0.005); and missing ≥1 trial medication dose (proxy for care quality) (1.43 (1.21–1.69), p < 0.001). Children with uncomplicated severe anaemia (Hb 4-6 g/dL and no severity features),\ud who never received a transfusion (per trial protocol) during the initial admission had a substantially lower risk of readmission (0.67(0.47–0.96), p = 0.04). Malaria (among children with no prior history of transfusion) (0.60(0.47–0.76), p < 0.001); younger-age (1.07 (1.03–1.10) per 1 year younger, p < 0.001) and known sickle cell disease (0.62(0.46–0.82), p = 0.001) also decreased risk of readmission. For anaemia re-admissions, gross splenomegaly and enlarged spleen increased risk by 1.73(1.23–2.44) and 1.46(1.18–1.82) respectively compared to no splenomegaly.\ud Clustering identified four groups of children with readmission rates from 14 to 20%. The cluster with the highest readmission rate was characterised by very low haemoglobin (mean 3.6 g/dL). Sickle Cell Disease (SCD) predominated in two clusters associated with chronic repeated admissions or severe, acute presentations in largely undiagnosed SCD. The final cluster had high rates of malaria (78%), severity signs and very low platelet count, consistent with acute severe\ud malaria.\ud Conclusions: Younger age, HIV infection and history of previous hospital admissions predicted increased risk of readmission. However, no obvious clinical factors for intervention were identified. As missing medication doses was highly predictive, attention to care related factors may be important.\ud Trial registration: ISRCTN ISRCTN84086586.\ud Keywords: Severe anaemia, Readmission
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- 2021
6. Detection of herpes viruses in the cerebrospinal fluid of adults with suspected viral meningitis in Malawi
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Benjamin, L. A., Kelly, M., Cohen, D., Neuhann, F., Galbraith, S., Mallewa, M., Hopkins, M., Hart, I. J., Guiver, M., Lalloo, D. G., Heyderman, R. S., and Solomon, T.
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- 2013
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7. Brain imaging in normal kids: a community-based MRI study in Malawian children
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Potchen, M. J., Kampondeni, S. D., Mallewa, M., Taylor, T. E., and Birbeck, G. L.
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- 2013
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8. Cotrimoxazole or multi-mineral multi-vitamins to improve post-discharge outcomes following severe anaemia in African children: a randomised controlled trial
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Maitland, K, Olupot-Olupot, P, Kiguli, S, Chagaluka, G, Alaroker, F, Opoka, R, Mpoya, A, Walsh, K, Engoru, C, Nteziyaremye, J, Mallewa, M, Kennedy, N, Nakuya, M, Namayanja, C, Kayaga, J, Nabawanuka, E, Sennyondo, T, Aromut, D, Kumwenda, F, Williams Musika, C, Thomason, M, Bates, I, Boele Von Hensbroek, M, Evans, J, Uyoya, S, Williams, T, Frost, G, George, E, Gibb, D, Walker, A, Medical Research Council (MRC), Medical Research Council, Medical Research Council, UK, Imperial College Healthcare NHS Trust- BRC Funding, and Engineering & Physical Science Research Council (EPSRC)
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SPRINKLES ,YOUNG-CHILDREN ,Malawi ,Science & Technology ,IRON FORTIFICATION ,MORTALITY ,Infant ,Anemia ,PROPHYLAXIS ,Patient Discharge ,TRACT trial group ,1117 Public Health and Health Services ,DEFICIENCY ,DOUBLE-BLIND ,MALARIA ,TRANSFUSION ,INFECTION ,Dietary Supplements ,Trimethoprim, Sulfamethoxazole Drug Combination ,Humans ,Uganda ,Child ,Life Sciences & Biomedicine ,Public, Environmental & Occupational Health ,0605 Microbiology - Abstract
Background: Severe anaemia (haemoglobin0.2). By day180, 489(24%) MVMM vs 509(26%) iron/folate had experienced one or more SAEs (HR=0.95 (0.84- 1.07), p=0.40) and 500(25%) cotrimoxazole vs 498(25%) no cotrimoxazole (HR=1.01 (0.89,1.15) p=0.85). Most SAEs were readmissions, occurring in 692(17%) children (175(4%) with ≥2 readmissions). Interpretation: Neither enhanced supplementation with MVMM versus iron/folate treatment or cotrimoxazole prophylaxis improved 6-month survival. High rates of hospital re-admission suggest that novel interventions are urgently required for severe anaemia, given the burden it places on overstretched health services in Africa.
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- 2019
9. Corrigendum: Haematological quality and age of donor blood issued for paediatric transfusion to four hospitals in sub-Saharan Africa
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Uyoga, S, Mpoya, A, Olupot-Olupot, P, Kiguli, S, Opoka, RO, Engoru, C, Mallewa, M, Kennedy, N, M'baya, B, Kyeyune, D, Wabwire, B, Bates, I, Gibb, DM, Walker, AS, George, EC, Williams, TN, Maitland, K, Medical Research Council, and Medical Research Council, UK
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haematocrit ,anaemia ,Science & Technology ,donor blood pack ,Cardiovascular System & Hematology ,1116 Medical Physiology ,1103 Clinical Sciences ,Hematology ,Life Sciences & Biomedicine ,blood transfusion services ,haemoglobin - Published
- 2019
10. A mixed-methods evaluation of neurorehabilitation resources for pediatric cerebral malaria survivors in Blantyre, Malawi
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Boubour, A., primary, Mboma, S., additional, Birbeck, G.L., additional, Mitochi, C., additional, Taylor, T., additional, Seydel, K.B., additional, Mallewa, M., additional, Chinguo, D., additional, Gladstone, M., additional, Mohamed, S., additional, and Thakur, K.T., additional
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- 2019
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11. Dengue and Other Emerging Flaviviruses
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Solomon, T. and Mallewa, M.
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- 2001
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12. Safety of lumbar puncture in comatose children with clinical features of cerebral malaria
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Moxon, Christopher A., Zhao, L., Li, C., Seydel, K. B., Maccormick, I. J., Diggle, Peter John, Mallewa, M., Solomon, T., Beare, N. A., Glover, S. J., Harding, S. P., Lewallen, S., Kamponendi, S., Potchen, M. J., Taylor, T. E., Postels, D. G., Moxon, Christopher A., Zhao, L., Li, C., Seydel, K. B., Maccormick, I. J., Diggle, Peter John, Mallewa, M., Solomon, T., Beare, N. A., Glover, S. J., Harding, S. P., Lewallen, S., Kamponendi, S., Potchen, M. J., Taylor, T. E., and Postels, D. G.
- Abstract
Objective: We assessed the independent association of lumbar puncture (LP) and death in Malawian children admitted to the hospital with the clinical features of cerebral malaria (CM). Methods: This was a retrospective cohort study in Malawian children with clinical features of CM. Allocation to LP was nonrandom and was associated with severity of illness. Propensity score-based analyses were used to adjust for this bias and assess the independent association between LP and mortality. Results: Data were available for 1,075 children: 866 (80.6%) underwent LP and 209 (19.4%) did not. Unadjusted mortality rates were lower in children who underwent LP (15.3% vs 26.7% in the no-LP group) but differences in covariates between the 2 groups suggested bias in LP allocation. After propensity score matching, all covariates were balanced. Propensity score-based analyses showed no change in mortality rate associated with LP: by inverse probability weighting, the average risk reduction was 2.0% at 12 hours (95% confidence interval -1.5% to 5.5%, p = 0.27) and 1.7% during hospital admission (95% confidence interval -4.5% to 7.9%, p = 0.60). Undergoing LP did not change the risk of mortality in subanalyses of children with severe brain swelling on MRI or in those with papilledema. Conclusion: In comatose children with suspected CM who were clinically stable, we found no evidence that LP increases mortality, even in children with objective signs of raised intracranial pressure
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- 2016
13. Evidence of Rise in Rabies Cases in Southern Malawi – Better Preventative Measures Are Urgently Required
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Depani, SJ, Kennedy, N, Mallewa, M, and Molyneux, EM
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We describe five children who died of clinical rabies in a three month period (September to November 2011) in the Queen Elizabeth Central Hospital. From previous experience and hospital records, this number of cases is higher than expected. We are concerned that difficulty in accessing post-exposure prophylaxis (PEP) rabies vaccine may be partly responsible for this rise. We advocate: (a) prompt course of active immunisation for all patients with significant exposure to proven or suspected rabid animals. (b) the use of an intradermal immunisation regime that requires a smaller quantity of the vaccine than the intramuscular regime and gives a better antibody response. (c) improved dog rabies control measures
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- 2012
14. Lumbar puncture refusal in sub-Saharan Africa: A call for further understanding and intervention
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Thakur, K. T., primary, Mateyo, K., additional, Hachaambwa, L., additional, Kayamba, V., additional, Mallewa, M., additional, Mallewa, J., additional, Nwazor, E. O., additional, Lawal, T., additional, Mallum, C. B., additional, Atadzhanov, M., additional, Boulware, D. R., additional, Birbeck, G. L., additional, and Siddiqi, O. K., additional
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- 2015
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15. G262(P) Paediatric disability in malawi: exploring information and advice needs at community level
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Shanahan, O, primary, Mallewa, M, additional, Wazakili, M, additional, Chimoyo, J, additional, and Gladstone, M, additional
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- 2015
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16. PA.11 MOYO: The House That Saves Lives. Infant Rehabilitation Feeding Centre
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Mwenechanya, LCM, primary and Mallewa, M, additional
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- 2014
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17. G115 Rehabilitation of Children with Neurodisability Following Brain Injury in Malawi: Perspectives of Families and Health-Workers
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Holme, A., primary, Mallewa, M., additional, Chinguo, D., additional, Mahebere-Chirambo, C., additional, and Gladstone, M., additional
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- 2013
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18. Detection of herpes viruses in the cerebrospinal fluid of adults with suspected viral meningitis in Malawi
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Benjamin, L. A., primary, Kelly, M., additional, Cohen, D., additional, Neuhann, F., additional, Galbraith, S., additional, Mallewa, M., additional, Hopkins, M., additional, Hart, I. J., additional, Guiver, M., additional, Lalloo, D. G., additional, Heyderman, R. S., additional, and Solomon, T., additional
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- 2012
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19. HIV-associated lipodystrophy: a review of underlying mechanisms and therapeutic options
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Mallewa, J. E., primary, Wilkins, E., additional, Vilar, J., additional, Mallewa, M., additional, Doran, D., additional, Back, D., additional, and Pirmohamed, M., additional
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- 2008
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20. Rabies encephalitis presenting as cerebral malaria
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Mallewa, M., primary, Fooks, A.R., additional, Banda, D., additional, Chikungwa, P., additional, Mankhambo, L., additional, Molyneux, E., additional, Molyneux, M., additional, and Solomon, T., additional
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- 2006
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21. Long-term Use Of Rectal Carbamazepine in a Patient with Intractable Epilepsy
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Mallewa, M, primary, Appleton, R, additional, and Aindow, A, additional
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- 2002
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22. Case Report: Evidence of Rise in Rabies Cases in Southern Malawi -- Better Preventative Measures Are Urgently Required.
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Depani, S. J., Kennedy, N., Mallewa, M., and Molyneux, EM
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- 2012
23. Dengue and Other Emerging Flaviviruses
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*, T. Solomon, , and Mallewa, M.
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Flaviviruses are among the most important emerging viruses known to man. Most are arboviruses (arthropod-borne) being transmitted by mosquitoes or ticks. They derived from a common ancestor 1020000 years ago and are evolving rapidly to fill new ecological niches. Many are spreading to new geographical areas and causing increased numbers of infections. Traditionally, three clinical syndromes are recognized: fever-arthralgia-rash, viral haemorrhagic fever, and neurological disease, though for some flaviviruses the disease pattern is changing. Dengue, the most important flavivirus, is transmitted between humans by Aedes mosquitoes. Recent work is elucidating the pathogenesis of its most severe form, dengue haemorrhagic fever. Yellow fever, which has epidemiological similarities to dengue, was under control in the mid-20th century, but is once again increasing. Japaneseencephalitis virus is numerically the most important cause of epidemic encephalitis; its geographical area is expanding despite the availability of vaccines. Other mosquito-borne neurotropic flaviviruses with clinical and epidemiological similarities are found across the globe. These include St Louis encephalitis virus, Murray Valley encephalitis virus, and West Nile virus, which recently reached the Americas for the first time. In cooler northern climates ticks are more important vectors. Tick-borne encephalitis virus occurs across large parts of Eastern Europe and the Commonwealth of Independent states. The tick-borne haemorrhagic flaviviruses, Omsk haemorrhagic fever and Kyasanur Forrest disease are localized in small areas. Copyright 2001 The British Infection Society
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- 2001
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24. Lesson of the week: paralytic rabies after a two week holiday in India.
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Solomon T, Marston D, Mallewa M, Felton T, Shaw S, McElhinney LM, Das K, Mansfield K, Wainwright J, Kwong GNM, and Fooks AR
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- 2005
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25. Lesson of the week: Paralytic rabies after a two week holiday in India
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Solomon, T., Denise Marston, Mallewa, M., Felton, T., Shaw, S., Mcelhinney, L. M., Das, K., Mansfield, K., Wainwright, J., Kwong, G. N. M., and Fooks, A. R.
26. Systems thinking needed for rabies control - Authors' reply.
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Depani S, Mallewa M, Kennedy N, Molyneux E, and Warrell M
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- 2013
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27. Emerging viral diseases
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Solomon, T. and Mallewa, M.
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Emerging diseases include new diseases caused by previously unknown organisms, and old diseases that are increasing in incidence or geographical area. Emerging viral infections can be divided into those that are transmitted by insects (the arthropod-borne viruses, or arboviruses) and those that are transmitted directly from animals or humans. Clinically, the most important presentations are either haemorrhagic or neurological. This contribution focuses on the neurotropic arboviruses and some other emerging CNS viruses.
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- 2005
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28. Japanese Encephalitis and West Nile Viruses (Book).
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Mallewa, M.
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JAPANESE B encephalitis , *NONFICTION - Abstract
Reviews the book 'Japanese Encephalitis and West Nile Viruses,' edited by J.S. MacKenzie, A.D.T. Barrett and V. Deubel.
- Published
- 2003
29. Childhood growth during recovery from acute illness in Africa and South Asia: a secondary analysis of the childhood acute illness and nutrition (CHAIN) prospective cohort.
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Bourdon C, Diallo AH, Mohammad Sayeem Bin Shahid AS, Khan MA, Saleem AF, Singa BO, Gnoumou BS, Tigoi C, Otieno CA, Oduol CO, Lancioni CL, Manyasi C, McGrath CJ, Maronga C, Lwanga C, Brals D, Ahmed D, Mondal D, Denno DM, Mangale DI, Chimwezi E, Mbale E, Mupere E, Salauddin Mamun GM, Ouédraogo I, Berkley JA, Njunge JM, Njirammadzi J, Mukisa J, Thitiri J, Walson JL, Jemutai J, Tickell KD, Shahrin L, Mallewa M, Hossain MI, Chisti MJ, Timbwa M, Mburu M, Ngari MM, Ngao N, Aber P, Harawa PP, Sukhtankar P, Bandsma RHJ, Bamouni RM, Molyneux S, Mwaringa S, Shaima SN, Ali SA, Afsana SM, Banu S, Ahmed T, Voskuijl WP, and Kazi Z
- Abstract
Background: Growth faltering is well-recognized during acute childhood illness and growth acceleration during convalescence, with or without nutritional therapy, may occur. However, there are limited recent data on growth after hospitalization in low- and middle-income countries., Methods: We evaluated growth following hospitalization among children aged 2-23 months in sub-Saharan Africa and South Asia. Between November 2016 and January 2019, children were recruited at hospital admission and classified as: not-wasted (NW), moderately-wasted (MW), severely-wasted (SW), or having nutritional oedema (NO). We describe earlier (discharge to 45-days) and later (45- to 180-days) changes in length-for-age [LAZ], weight-for-age [WAZ], mid-upper arm circumference [MUACZ], weight-for-length [WLZ] z-scores, and clinical, nutritional, and socioeconomic correlates., Findings: We included 2472 children who survived to 180-days post-discharge: NW, 960 (39%); MW, 572 (23%); SW, 682 (28%); and NO, 258 (10%). During 180-days, LAZ decreased in NW (-0.27 [-0.36, -0.19]) and MW (-0.23 [-0.34, -0.11]). However, all groups increased WAZ (NW, 0.21 [95% CI: 0.11, 0.32]; MW, 0.57 [0.44, 0.71]; SW, 1.0 [0.88, 1.1] and NO, 1.3 [1.1, 1.5]) with greatest gains in the first 45-days. Of children underweight (<-2 WAZ) at discharge, 66% remained underweight at 180-days. Lower WAZ post-discharge was associated with age-inappropriate nutrition, adverse caregiver characteristics, small size at birth, severe or moderate anaemia, and chronic conditions, while lower LAZ was additionally associated with household-level exposures but not with chronic medical conditions., Interpretation: Underweight and poor linear growth mostly persisted after an acute illness. Beyond short-term nutritional supplementation, improving linear growth post-discharge may require broader individual and family support., Funding: Bill & Melinda Gates FoundationOPP1131320; National Institute for Health ResearchNIHR201813., Competing Interests: Members of the writing group declare having received support from the Bill and Melinda Gates Foundation (BMGF) for staff and research activities directly linked to this project which was paid to their universities or institutions (JAB, JLW, RHJB). Reimbursement for travel directly related to this project was also provided by BMGF and paid through the universities (JLW, JAB). JAB participated in a leadership role for the Commonwealth Association for Paediatic Gastroenterology & Nutrition (CAPGAN) and on a Data Safety Monitoring Board (DSMB) for a study regarding vitamin D., (© 2024 The Authors.)
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- 2024
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30. Micronutrients and nutritional status among children living with HIV with and without severe acute malnutrition: IMPAACT P1092.
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Bwakura-Dangarembizi M, Ziemba L, Tierney C, Reding C, Bone F, Bradford S, Costello D, Browning R, Moye J, Vhembo T, Ngocho JS, Mallewa M, Chinula L, Musoke P, and Owor M
- Abstract
Background: Micronutrient deficiencies from malabsorption, gut infections, and altered gut barrier function are common in children living with the human immunodeficiency virus (CLHIV) and may worsen with severe acute malnutrition (SAM). Exploratory data of baseline zinc and selenium levels and changes over 48 weeks in children living with HIV by nutritional status are presented., Methods: Zinc, selenium, serum protein and albumin levels measured at study entry and over 48 weeks were compared between children aged 6 to < 36 months who were living with HIV and had SAM or mild malnutrition-normal nutrition. Children with SAM were enrolled after 10-18 days of nutritional rehabilitation. Two-sided t-tests were used to compare levels and changes in levels of micronutrients and proteins by nutritional status., Results: Fifty-two participants, 25 with and 27 without SAM, of median (Q1,Q3) age 19 (13,25) and 18 (12,25) months respectively, were enrolled. Zinc deficiency was present at entry in 2/25 (8%) of those who had SAM. Mean (SD) baseline zinc levels were [52.2(15.3) and 54.7(12.0) µg/dL] for the SAM and non-SAM cohorts respectively while selenium levels were similar [92.9(25.0), 84.3(29.2) µg/L]. Mean changes of zinc and selenium from study entry to week 48 were similar between the children with and without SAM. There was no significant difference between baseline protein levels [75.2(13.2), 77.3(9.4) g/L] and the mean change from study entry to 48 weeks was also similar between the two groups; with a mean difference of 4.6 g/L [95% CI, (-2.4,11.6)]. Children with SAM compared to those without had significantly lower serum albumin levels at study entry with similar levels at 48 weeks., Conclusions: Children with severe malnutrition who were initiated/switched to zidovudine/lamivudine/boosted lopinavir following 10 to 18 days of nutritional rehabilitation showed normal baseline levels of selenium and zinc, and had comparable selenium levels after 48 weeks. There was a strong positive correlation in entry and week 48 selenium levels within each cohort and for zinc in the non-SAM cohort. These data support the current WHO recommended approach to management of severe malnutrition in CLHIV who are initiated on combination antiretroviral treatment., Trial Registration: Registered with ClinicalTrials.gov Identifier NCT01818258 26/03/2013., (© 2023. The Author(s).)
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- 2023
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31. Viral, Bacterial, Metabolic, and Autoimmune Causes of Severe Acute Encephalopathy in Sub-Saharan Africa: A Multicenter Cohort Study.
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Edridge A, Namazzi R, Tebulo A, Mfizi A, Deijs M, Koekkoek S, de Wever B, van der Ende A, Umiwana J, de Jong MD, Jans J, Verhoeven-Duif N, Titulaer M, van Karnebeek C, Seydel K, Taylor T, Asiimwe-Kateera B, van der Hoek L, Kabayiza JC, Mallewa M, Idro R, Boele van Hensbroek M, and van Woensel JBM
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- Child, Humans, Cohort Studies, Malawi, Brain Diseases diagnosis, Brain Diseases complications, Encephalitis complications, Encephalitis diagnosis, Encephalitis epidemiology, Metabolic Diseases
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Objectives: To assess whether viral, bacterial, metabolic, and autoimmune diseases are missed by conventional diagnostics among children with severe acute encephalopathy in sub-Saharan Africa., Study Design: One hundred thirty-four children (6 months to 18 years) presenting with nontraumatic coma or convulsive status epilepticus to 1 of 4 medical referral centers in Uganda, Malawi, and Rwanda were enrolled between 2015 and 2016. Locally available diagnostic tests could be supplemented in 117 patients by viral, bacterial, and 16s quantitative polymerase chain reaction testing, metagenomics, untargeted metabolomics, and autoimmune immunohistochemistry screening., Results: Fourteen (12%) cases of viral encephalopathies, 8 (7%) cases of bacterial central nervous system (CNS) infections, and 4 (4%) cases of inherited metabolic disorders (IMDs) were newly identified by additional diagnostic testing as the most likely cause of encephalopathy. No confirmed cases of autoimmune encephalitis were found. Patients for whom additional diagnostic testing aided causal evaluation (aOR 3.59, 90% CI 1.57-8.36), patients with a viral CNS infection (aOR 7.91, 90% CI 2.49-30.07), and patients with an IMD (aOR 9.10, 90% CI 1.37-110.45) were at increased risk for poor outcome of disease., Conclusions: Viral and bacterial CNS infections and IMDs are prevalent causes of severe acute encephalopathy in children in Uganda, Malawi, and Rwanda that are missed by conventional diagnostics and are associated with poor outcome of disease. Improved diagnostic capacity may increase diagnostic yield and might improve outcome of disease., (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)
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- 2023
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32. How Does Blood-Retinal Barrier Breakdown Relate to Death and Disability in Pediatric Cerebral Malaria?
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MacCormick IJC, Barrera V, Beare NAV, Czanner G, Potchen M, Kampondeni S, Heyderman RS, Craig AG, Molyneux ME, Mallewa M, White VA, Milner D, Hiscott P, Taylor TE, Seydel KB, and Harding SP
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- Blood-Retinal Barrier pathology, Child, Humans, Prospective Studies, Retina pathology, Brain Edema complications, Brain Edema pathology, Malaria, Cerebral complications
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Background: In cerebral malaria, the retina can be used to understand disease pathogenesis. The mechanisms linking sequestration, brain swelling, and death remain poorly understood. We hypothesized that retinal vascular leakage would be associated with brain swelling., Methods: We used retinal angiography to study blood-retinal barrier integrity. We analyzed retinal leakage, histopathology, brain magnatic resonance imaging (MRI), and associations with death and neurological disability in prospective cohorts of Malawian children with cerebral malaria., Results: Three types of retinal leakage were seen: large focal leak (LFL), punctate leak (PL), and vessel leak. The LFL and PL were associated with death (odds ratio [OR] = 13.20, 95% confidence interval [CI] = 5.21-33.78 and OR = 8.58, 95% CI = 2.56-29.08, respectively) and brain swelling (P < .05). Vessel leak and macular nonperfusion were associated with neurological disability (OR = 3.71, 95% CI = 1.26-11.02 and OR = 9.06, 95% CI = 1.79-45.90). Large focal leak was observed as an evolving retinal hemorrhage. A core of fibrinogen and monocytes was found in 39 (93%) white-centered hemorrhages., Conclusions: Blood-retina barrier breakdown occurs in 3 patterns in cerebral malaria. Associations between LFL, brain swelling, and death suggest that the rapid accumulation of cerebral hemorrhages, with accompanying fluid egress, may cause fatal brain swelling. Vessel leak, from barrier dysfunction, and nonperfusion were not associated with severe brain swelling but with neurological deficits, suggesting hypoxic injury in survivors., (© The Author(s) 2020. Published by Oxford University Press for the Infectious Diseases Society of America.)
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- 2022
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33. Effect on growth of exposure to maternal antiretroviral therapy in breastmilk versus extended infant nevirapine prophylaxis among HIV-exposed perinatally uninfected infants in the PROMISE randomized trial.
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Stranix-Chibanda L, Tierney C, Pinilla M, George K, Aizire J, Chipoka G, Mallewa M, Naidoo M, Nematadzira T, Kusakara B, Violari A, Mbengeranwa T, Njau B, Fairlie L, Theron G, Mubiana-Mbewe M, Khadse S, Browning R, Fowler MG, and Siberry GK
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- Adult, Female, Humans, Infant, Male, Anti-Retroviral Agents therapeutic use, Child Development, HIV Infections drug therapy, HIV Infections prevention & control, Milk, Human chemistry, Nevirapine analysis
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Background: Malnutrition is highly prevalent in HIV-exposed perinatally uninfected infants (HEUs) increasing the risk of morbidity and mortality throughout the life course. We set out to compare the effect of postnatal exposure to maternal antiretroviral therapy (mART) in breastmilk versus infant Nevirapine prophylaxis (iNVP) on somatic growth of HEUs in the randomized PROMISE trial., Methods and Findings: We randomized 2431 mothers with HIV and their 2444 HEUs from six African countries and India 6-14 days after delivery to mART or iNVP for prevention of breastmilk HIV transmission. The mART regimen contained tenofovir/emtricitabine (99%) plus lopinavir/ritonavir. Infant growth parameters were compared at postnatal week 10, 26, 74 and 104 using World Health Organization (WHO) z-scores for length-for-age (LAZ), weight-for-age (WAZ), and head circumference-for-age (HCAZ). Week 26 LAZ was the primary endpoint measure. Student T-tests compared mean LAZ, WAZ, and HCAZ; estimated mean and 95% confidence interval (CI) are presented. Maternal and infant baseline characteristics were comparable between study arms. The estimated median breastfeeding duration was 70 weeks. After a mean follow-up of 88 weeks, mean LAZ and WAZ were below the WHO reference population mean at all timepoints, whereas mean HCAZ was not. The mART and iNVP arms did not differ for the primary outcome measure of LAZ at week 26 (p-value = 0.39; estimated mean difference (95%CI) of -0.05 (-0.18, 0.07)) or any of the other secondary growth outcome measures or timepoints (all p-values≥0.16). Secondary analyses of the primary outcome measure adjusting for week 0 LAZ and other covariates did not change these results (all p-values≥0.09). However, infants assigned to mART were more likely to have stunting compared to iNVP infants at week 26 (odds ratio (95% CI): 1.28 (1.05, 1.57))., Conclusions: In HEUs, growth effects from postnatal exposure to mART compared to iNVP were comparable for measures on length, weight and head circumference with no clinically relevant differences between the groups. Despite breastfeeding into the second year of life, length and weight were below reference population means at all ages in both arms. Further investment is needed to optimize postnatal growth of infants born to women with HIV., Clinical Trial Registration: ClinicalTrials.gov number NCT01061151., Competing Interests: The authors have declared that no competing interests exist.
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- 2021
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34. Incidence and predictors of hospital readmission in children presenting with severe anaemia in Uganda and Malawi: a secondary analysis of TRACT trial data.
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Connon R, George EC, Olupot-Olupot P, Kiguli S, Chagaluka G, Alaroker F, Opoka RO, Mpoya A, Walsh K, Engoru C, Nteziyaremye J, Mallewa M, Kennedy N, Nakuya M, Namayanja C, Nabawanuka E, Sennyondo T, Amorut D, Williams Musika C, Bates I, Boele van Hensbroek M, Evans JA, Uyoga S, Williams TN, Frost G, Gibb DM, Maitland K, and Walker AS
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- Child, Humans, Incidence, Malawi epidemiology, Patient Readmission, Uganda epidemiology, Anemia epidemiology, Anemia therapy, HIV Infections
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Background: Severe anaemia (haemoglobin < 6 g/dL) is a leading cause of recurrent hospitalisation in African children. We investigated predictors of readmission in children hospitalised with severe anaemia in the TRACT trial (ISRCTN84086586) in order to identify potential future interventions., Methods: Secondary analyses of the trial examined 3894 children from Uganda and Malawi surviving a hospital episode of severe anaemia. Predictors of all-cause readmission within 180 days of discharge were identified using multivariable regression with death as a competing risk. Groups of children with similar characteristics were identified using hierarchical clustering., Results: Of the 3894 survivors 682 (18%) were readmitted; 403 (10%) had ≥2 re-admissions over 180 days. Three main causes of readmission were identified: severe anaemia (n = 456), malaria (n = 252) and haemoglobinuria/dark urine syndrome (n = 165). Overall, factors increasing risk of readmission included HIV-infection (hazard ratio 2.48 (95% CI 1.63-3.78), p < 0.001); ≥2 hospital admissions in the preceding 12 months (1.44(1.19-1.74), p < 0.001); history of transfusion (1.48(1.13-1.93), p = 0.005); and missing ≥1 trial medication dose (proxy for care quality) (1.43 (1.21-1.69), p < 0.001). Children with uncomplicated severe anaemia (Hb 4-6 g/dL and no severity features), who never received a transfusion (per trial protocol) during the initial admission had a substantially lower risk of readmission (0.67(0.47-0.96), p = 0.04). Malaria (among children with no prior history of transfusion) (0.60(0.47-0.76), p < 0.001); younger-age (1.07 (1.03-1.10) per 1 year younger, p < 0.001) and known sickle cell disease (0.62(0.46-0.82), p = 0.001) also decreased risk of readmission. For anaemia re-admissions, gross splenomegaly and enlarged spleen increased risk by 1.73(1.23-2.44) and 1.46(1.18-1.82) respectively compared to no splenomegaly. Clustering identified four groups of children with readmission rates from 14 to 20%. The cluster with the highest readmission rate was characterised by very low haemoglobin (mean 3.6 g/dL). Sickle Cell Disease (SCD) predominated in two clusters associated with chronic repeated admissions or severe, acute presentations in largely undiagnosed SCD. The final cluster had high rates of malaria (78%), severity signs and very low platelet count, consistent with acute severe malaria., Conclusions: Younger age, HIV infection and history of previous hospital admissions predicted increased risk of readmission. However, no obvious clinical factors for intervention were identified. As missing medication doses was highly predictive, attention to care related factors may be important., Trial Registration: ISRCTN ISRCTN84086586 ., (© 2021. The Author(s).)
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- 2021
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35. Beyond pledges: academic journals in high-income countries can do more to decolonise global health.
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Olusanya BO, Mallewa M, and Ogbo FA
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- Adolescent, Developed Countries, Developing Countries, Humans, Income, Global Health, Periodicals as Topic
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Competing Interests: Competing interests: None declared.
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- 2021
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36. "We can't handle things we don't know about": perceived neurorehabilitation challenges for Malawian paediatric cerebral malaria survivors.
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Boubour A, Mboma S, Võ T, Birbeck GL, Seydel KB, Mallewa M, Chinguo D, Gladstone M, Mohamed S, and Thakur KT
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- Child, Focus Groups, Humans, Malawi, Qualitative Research, Survivors, Malaria, Cerebral, Neurological Rehabilitation
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Background: We sought to identify perceptions of neurorehabilitation challenges for paediatric cerebral malaria (CM) survivors post-hospital discharge at Queen Elizabeth Central Hospital (QECH) in Blantyre, Malawi., Methods: An exploratory approach was used to qualitatively investigate the perceived neurorehabilitation challenges for paediatric CM survivors. Data were collected through semi-structured in-depth interviews (IDIs) and focus group discussions (FGDs). Eighteen data-gathering sessions were conducted with 38 total participants, including 3 FGDs with 23 primary caregivers, 11 IDIs with healthcare workers at QECH, and 4 IDIs with community-based rehabilitation workers (CRWs)., Results: FGDs revealed that caregivers lack important knowledge about CM and fear recurrence of CM in their children. Post-CM children and families experience substantial stigma and sociocultural barriers to integrating into their community and accessing neurorehabilitative care. At a community-level, rehabilitation infrastructure, including trained staff, equipment, and programmes, is extremely limited. Rehabilitation services are inequitably accessible, and community-based rehabilitation remains largely unavailable., Conclusions: There is an urgent need to establish further training of rehabilitation personnel at all levels and to build accessible rehabilitation infrastructure in Malawi for post-CM patients. Additional work is required to expand this study across multiple regions for a holistic understanding of neurorehabilitation needs.
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- 2020
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37. Long-term outcomes for children with disability and severe acute malnutrition in Malawi.
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Lelijveld N, Groce N, Patel S, Nnensa T, Chimwezi E, Gladstone M, Mallewa M, Wells J, Seal A, and Kerac M
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- Aftercare, Child, Hand Strength, Humans, Longitudinal Studies, Malawi epidemiology, Patient Discharge, Disabled Children, Severe Acute Malnutrition epidemiology
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Introduction: Severe acute malnutrition (SAM) and disability are major global health issues. Although they can cause and influence each other, data on their co-existence are sparse. We aimed to describe the prevalence and patterns of disability among a cohort of children with SAM., Methods: A longitudinal cohort study in Malawi followed SAM survivors up to 7 years postdischarge. Clinical and anthropometric profiles were compared with sibling and community controls. Disability at original admission was identified clinically; at 7-year follow-up a standardised screening tool called 'the Washington Group Questionnaire' was used., Results: 60/938 (6.4%) of admissions to SAM treatment had clinically obvious disability at admission. Post-treatment mortality was high, with only 11/60 (18%) surviving till 7-year follow-up. SAM children with a disability at admission had 6.99 (95% CI 3.49 to 14.02; p<0.001) greater risk of dying compared with children without disability. They were also older, less likely to be HIV positive or have oedema and more severely malnourished. Long-term survivors were more stunted, had less catch-up growth, smaller head circumference, weaker hand grip strength and poorer school achievement than non-disabled survivors.The Washington Group Questionnaire confirmed disability in all who had been identified clinically, and identified many who had not been previously flagged., Conclusion: Disability is common among children affected by SAM. Those with disability-associated SAM have greatly increased risk of dying even if they survive the initial episode of malnutrition. Survivors have poorer growth, physical strength and school achievement. To enable all children to survive and thrive post-SAM, it is vital to focus more on those with disabilities. SAM treatment programmes should consider using not just clinical assessment but structured assessments to better identify at-risk individuals as well as understand the population of children for which they are developing services., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.)
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- 2020
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38. Central Nervous System Virus Infection in African Children with Cerebral Malaria.
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Postels DG, Osei-Tutu L, Seydel KB, Xu Q, Li C, Taylor TE, John CC, Mallewa M, Solomon T, Agbenyega T, Ansong D, Opoka RO, Khan LM, Ramachandran PS, Leon KE, DeRisi JL, Langelier C, and Wilson MR
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- Central Nervous System Viral Diseases cerebrospinal fluid, Central Nervous System Viral Diseases complications, Central Nervous System Viral Diseases virology, Child, Coinfection parasitology, Coinfection virology, Female, Ghana, Herpesviridae Infections complications, Herpesviridae Infections parasitology, Herpesviridae Infections virology, High-Throughput Nucleotide Sequencing, Humans, Malaria, Cerebral cerebrospinal fluid, Malaria, Cerebral complications, Malawi, Male, Retinal Diseases parasitology, Retinal Diseases virology, Uganda, Central Nervous System Viral Diseases parasitology, Malaria, Cerebral virology
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We aimed to identify the contribution of central nervous system (CNS) viral coinfection to illness in African children with retinopathy-negative or retinopathy-positive cerebral malaria (CM). We collected cerebrospinal fluid (CSF) from 272 children with retinopathy-negative or retinopathy-positive CM and selected CSF from 111 of these children (38 retinopathy positive, 71 retinopathy negative, 2 retinopathy unknown) for analysis by metagenomic next-generation sequencing. We found CSF viral coinfections in 7/38 (18.4%) retinopathy-positive children and in 18/71 (25.4%) retinopathy-negative children. Excluding HIV-1, human herpesviruses (HHV) represented 61% of viruses identified. Excluding HIV-1, CNS viral coinfection was equally likely in children who were retinopathy positive and retinopathy negative ( P = 0.1431). Neither mortality nor neurological morbidity was associated with the presence of virus (odds ratio [OR] = 0.276, 95% CI: 0.056-1.363). Retinopathy-negative children with a higher temperature, lower white blood cell count, or being dehydrated were more likely to have viral coinfection. Level of consciousness at admission was not associated with CNS viral coinfection in retinopathy-negative children. Viral CNS coinfection is unlikely to contribute to coma in children with CM. The herpesviruses other than herpes simplex virus may represent incidental bystanders in CM, reactivating during acute malaria infection.
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- 2020
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39. Pan-GWAS of Streptococcus agalactiae Highlights Lineage-Specific Genes Associated with Virulence and Niche Adaptation.
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Gori A, Harrison OB, Mlia E, Nishihara Y, Chan JM, Msefula J, Mallewa M, Dube Q, Swarthout TD, Nobbs AH, Maiden MCJ, French N, and Heyderman RS
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- Animals, Anti-Bacterial Agents pharmacology, Host Microbial Interactions genetics, Humans, Internationality, Phylogeny, Streptococcal Infections microbiology, Streptococcus agalactiae pathogenicity, Virulence genetics, Virulence Factors genetics, Adaptation, Physiological genetics, Genome, Bacterial, Genome-Wide Association Study, Streptococcus agalactiae genetics, Streptococcus agalactiae physiology
- Abstract
Streptococcus agalactiae (group B streptococcus; GBS) is a colonizer of the gastrointestinal and urogenital tracts, and an opportunistic pathogen of infants and adults. The worldwide population of GBS is characterized by clonal complexes (CCs) with different invasive potentials. CC17, for example, is a hypervirulent lineage commonly associated with neonatal sepsis and meningitis, while CC1 is less invasive in neonates and more commonly causes invasive disease in adults with comorbidities. The genetic basis of GBS virulence and the extent to which different CCs have adapted to different host environments remain uncertain. We have therefore applied a pan-genome-wide association study (GWAS) approach to 1,988 GBS strains isolated from different hosts and countries. Our analysis identified 279 CC-specific genes associated with virulence, disease, metabolism, and regulation of cellular mechanisms that may explain the differential virulence potential of particular CCs. In CC17 and CC23, for example, we have identified genes encoding pilus, quorum-sensing proteins, and proteins for the uptake of ions and micronutrients which are absent in less invasive lineages. Moreover, in CC17, carriage and disease strains were distinguished by the allelic variants of 21 of these CC-specific genes. Together our data highlight the lineage-specific basis of GBS niche adaptation and virulence. IMPORTANCE GBS is a leading cause of mortality in newborn babies in high- and low-income countries worldwide. Different strains of GBS are characterized by different degrees of virulence, where some are harmlessly carried by humans or animals and others are much more likely to cause disease.The genome sequences of almost 2,000 GBS samples isolated from both animals and humans in high- and low- income countries were analyzed using a pan-genome-wide association study approach. This allowed us to identify 279 genes which are associated with different lineages of GBS, characterized by a different virulence and preferred host. Additionally, we propose that the GBS now carried in humans may have first evolved in animals before expanding clonally once adapted to the human host.These findings are essential to help understand what is causing GBS disease and how the bacteria have evolved and are transmitted., (Copyright © 2020 Gori et al.)
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- 2020
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40. Decreased growth among antiretroviral drug and HIV-exposed uninfected versus unexposed children in Malawi and Uganda.
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Aizire J, Sikorskii A, Ogwang LW, Kawalazira R, Mutebe A, Familiar-Lopez I, Mallewa M, Taha T, Boivin MJ, and Fowler MG
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- Adult, Anti-Retroviral Agents therapeutic use, Child, Preschool, Female, HIV Infections drug therapy, HIV Infections transmission, Humans, Infant, Linear Models, Malawi, Male, Post-Exposure Prophylaxis, Pre-Exposure Prophylaxis, Pregnancy, Prospective Studies, Uganda, Young Adult, Anti-Retroviral Agents adverse effects, Growth and Development drug effects, HIV Infections prevention & control, Infectious Disease Transmission, Vertical prevention & control, Pregnancy Complications, Infectious prevention & control
- Abstract
Objective: To compare growth among antiretroviral drug and maternal HIV-exposed uninfected (AHEU) versus age-matched and sex-matched HIV-unexposed uninfected (HUU) children., Design: Prospective cohort of AHEU children identified from the PROMISE trial (NCT01061151: clinicaltrials.gov registry) and age-matched and sex-matched HUU controls from child-wellness clinics, enrolled (September 2013 to October 2014) in Malawi and Uganda., Methods: Weight-for-age (WAZ), length-for-age (LAZ), weight-for-length (WLZ), and head-circumference-for-age (HCAZ) z-scores were derived at 12 months and 24 months of age. Wilcoxon Rank-Sum and Fisher's exact tests were used for unadjusted exposure group comparisons. Generalized Estimating Equations models estimated adjusted relative risks (aRR) for poor growth outcomes., Results: Overall, 471 (50.5%) AHEU and 462 (49.5%) HUU children were assessed. Ugandan AHEU compared with HUU children had significantly lower mean LAZ (P < 0.001) and WAZ (P < 0.001) at 12 and 24 months of age and HCAZ (P = 0.016) at 24 months, with similar but not significant differences among Malawian AHEU and HUU children. The risk of stunting (more than two standard deviations below the WHO population LAZ median) was increased among AHEU versus HUU children: aRR = 2.13 (95% confidence interval (CI): 1.36-3.33), P = 0.001 at 12 months, and aRR = 1.67 (95% CI 1.16-2.41), P = 0.006 at 24 months of age in Uganda; and aRR = 1.32 (95% CI 1.10-1.66), P = 0.018, at 24 months of age in Malawi. The risk of HCAZ below WHO median was increased among AHEU versus HUU children at 24 months of age, aRR = 1.35 (95% CI 1.02-1.79), P = 0.038 in Uganda; and aRR = 1.35 (95% CI 0.91-2.02), P = 0.139 in Malawi., Conclusion: Perinatal exposures to maternal HIV and antiretroviral drugs were associated with lower LAZ (including stunting), WAZ and HCAZ at 24 months of age compared with HUU children.
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- 2020
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41. A clinical trial of enteral Levetiracetam for acute seizures in pediatric cerebral malaria.
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Birbeck GL, Herman ST, Capparelli EV, Dzinjalamala FK, Abdel Baki SG, Mallewa M, Toto NM, Postels DG, Gardiner JC, Taylor TE, and Seydel KB
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- Acute Disease, Anticonvulsants adverse effects, Anticonvulsants pharmacokinetics, Benzodiazepines therapeutic use, Child, Child, Preschool, Coma drug therapy, Coma metabolism, Cross-Over Studies, Electroencephalography, Female, Humans, Levetiracetam pharmacokinetics, Malawi, Male, Phenobarbital adverse effects, Seizures metabolism, Seizures parasitology, Time Factors, Anticonvulsants administration & dosage, Levetiracetam administration & dosage, Malaria, Cerebral complications, Phenobarbital administration & dosage, Seizures drug therapy
- Abstract
Background: Acute seizures are common in pediatric cerebral malaria (CM), but usual care with phenobarbital risks respiratory suppression. We undertook studies of enteral levetiracetam (eLVT) to evaluate pharmacokinetics (PK), safety and efficacy including an open-label, randomized controlled trial (RCT) comparing eLVT to phenobarbital., Methods: Children 24-83 months old with CM were enrolled in an eLVT dose-finding study starting with standard dose (40 mg/kg load, then 30 mg/kg Q12 hours) titrated upward until seizure freedom was attained in 75% of subjects. The RCT that followed randomized children to eLVT vs. phenobarbital for acute seizures and compared the groups on minutes with seizures based upon continuous electroencephalogram. Due to safety concerns, midway through the study children allocated to phenobarbital received the drug only if they continued to have seizures (either clinically or electrographically) after benzodiazepine treatment. Secondary outcomes were treatment failure requiring cross over, coma duration and neurologic sequelae at discharge. PK and safety assessments were also undertaken., Results: Among 30 comatose CM children, eLVT was rapidly absorbed and well-tolerated. eLVT clearance was lower in patients with higher admission serum creatinine (SCr), but overall PK parameters were similar to prior pediatric PK studies. Within 4 h of the first dose, 90% reached therapeutic levels (> 20 μg/mL) and all were above 6 μg/mL. 7/7 children achieved seizure freedom on the initial eLVT dose. Comparing 23 eLVT to 21 phenobarbital patients among whom 15/21 received phenobarbital, no differences were seen for minutes with seizure, seizure freedom, coma duration, neurologic sequelae or death, but eLVT was safer (p = 0.019). Phenobarbital was discontinued in 3/15 due to respiratory side effects., Conclusion: Enteral LVT offers an affordable option for seizure control in pediatric CM and is safer than phenobarbital., Trial Registration: NCT01660672 . NCT01982812 .
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- 2019
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42. Co-trimoxazole or multivitamin multimineral supplement for post-discharge outcomes after severe anaemia in African children: a randomised controlled trial.
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Maitland K, Olupot-Olupot P, Kiguli S, Chagaluka G, Alaroker F, Opoka RO, Mpoya A, Walsh K, Engoru C, Nteziyaremye J, Mallewa M, Kennedy N, Nakuya M, Namayanja C, Kayaga J, Nabawanuka E, Sennyondo T, Aromut D, Kumwenda F, Musika CW, Thomason MJ, Bates I, von Hensbroek MB, Evans JA, Uyoga S, Williams TN, Frost G, George EC, Gibb DM, and Walker AS
- Subjects
- Child, Dietary Supplements, Humans, Infant, Malawi, Patient Discharge, Uganda, Anemia, Trimethoprim, Sulfamethoxazole Drug Combination
- Abstract
Background: Severe anaemia is a leading cause of paediatric admission to hospital in Africa; post-discharge outcomes remain poor, with high 6-month mortality (8%) and re-admission (17%). We aimed to investigate post-discharge interventions that might improve outcomes., Methods: Within the two-stratum, open-label, multicentre, factorial randomised TRACT trial, children aged 2 months to 12 years with severe anaemia, defined as haemoglobin of less than 6 g/dL, at admission to hospital (three in Uganda, one in Malawi) were randomly assigned, using sequentially numbered envelopes linked to a second non-sequentially numbered set of allocations stratified by centre and severity, to enhanced nutritional supplementation with iron and folate-containing multivitamin multimineral supplements versus iron and folate alone at treatment doses (usual care), and to co-trimoxazole versus no co-trimoxazole. All interventions were administered orally and were given for 3 months after discharge from hospital. Separately reported randomisations investigated transfusion management. The primary outcome was 180-day mortality. All analyses were done in the intention-to-treat population; follow-up was 180 days. This trial is registered with the International Standard Randomised Controlled Trial registry, ISRCTN84086586, and follow-up is complete., Findings: From Sept 17, 2014, to May 15, 2017, 3983 eligible children were randomly assigned to treatment, and followed up for 180 days. 164 (4%) were lost to follow-up. 1901 (95%) of 1997 assigned multivitamin multimineral supplement, 1911 (96%) of 1986 assigned iron and folate, and 1922 (96%) of 1994 assigned co-trimoxazole started treatment. By day 180, 166 (8%) children in the multivitamin multimineral supplement group versus 169 (9%) children in the iron and folate group had died (hazard ratio [HR] 0·97, 95% CI 0·79-1·21; p=0·81) and 172 (9%) who received co-trimoxazole versus 163 (8%) who did not receive co-trimoxazole had died (HR 1·07, 95% CI 0·86-1·32; p=0·56). We found no evidence of interactions between these randomisations or with transfusion randomisations (p>0·2). By day 180, 489 (24%) children in the multivitamin multimineral supplement group versus 509 (26%) children in the iron and folate group (HR 0·95, 95% CI 0·84-1·07; p=0·40), and 500 (25%) children in the co-trimoxazole group versus 498 (25%) children in the no co-trimoxazole group (1·01, 0·89-1·15; p=0·85) had had one or more serious adverse events. Most serious adverse events were re-admissions, occurring in 692 (17%) children (175 [4%] with at least two re-admissions)., Interpretation: Neither enhanced supplementation with multivitamin multimineral supplement versus iron and folate treatment or co-trimoxazole prophylaxis improved 6-month survival. High rates of hospital re-admission suggest that novel interventions are urgently required for severe anaemia, given the burden it places on overstretched health services in Africa., Funding: Medical Research Council and Department for International Development., (Copyright © 2019 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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- 2019
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43. Neurological letter from Malawi.
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Gadama Y, Kamtchum Tatuene J, Benjamin LA, Kamalo P, and Mallewa M
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- Health Workforce, Humans, Malawi, Neurology education, Neurosurgery, Pediatrics, Referral and Consultation, Volunteers, Neurologists supply & distribution, Neurology statistics & numerical data
- Abstract
Competing Interests: Competing interests: None declared.
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- 2019
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44. Neurodevelopmental effects of ante-partum and post-partum antiretroviral exposure in HIV-exposed and uninfected children versus HIV-unexposed and uninfected children in Uganda and Malawi: a prospective cohort study.
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Boivin MJ, Maliwichi-Senganimalunje L, Ogwang LW, Kawalazira R, Sikorskii A, Familiar-Lopez I, Kuteesa A, Nyakato M, Mutebe A, Namukooli JL, Mallewa M, Ruiseñor-Escudero H, Aizire J, Taha TE, and Fowler MG
- Subjects
- Anti-Retroviral Agents therapeutic use, Breast Feeding, Child, Preschool, Cohort Studies, Drug Combinations, Female, HIV Infections drug therapy, HIV Infections transmission, Humans, Infant, Lamivudine adverse effects, Lamivudine therapeutic use, Lopinavir adverse effects, Lopinavir therapeutic use, Malawi, Male, Post-Exposure Prophylaxis, Postpartum Period, Pre-Exposure Prophylaxis, Pregnancy, Prospective Studies, Ritonavir adverse effects, Ritonavir therapeutic use, Uganda, Zidovudine adverse effects, Zidovudine therapeutic use, Anti-Retroviral Agents adverse effects, HIV Infections prevention & control, Infectious Disease Transmission, Vertical prevention & control, Pregnancy Complications, Infectious prevention & control
- Abstract
Background: Antiretroviral medication during pregnancy and breastfeeding substantially decreases the risk of HIV transmission from mothers to infants, but its effects on the child's neurodevelopment are unknown. This study compared neurodevelopmental outcomes of ante-partum and post-partum antiretroviral exposure in HIV-exposed and uninfected children with HIV-unexposed and uninfected children at ages 12, 24, 48, and 60 months., Methods: For this study, a prospective cohort of HIV-exposed and uninfected children was identified from two research sites in the PROMISE-BF trial (at Blantyre, Malawi, and Kampala, Uganda), in which pregnant HIV-infected mothers were randomly assigned to triple antiretroviral prophylaxis (lopinavir-ritonavir plus either lamivudine and zidovudine or emtricitabine and tenofovir), versus zidovudine alone. Post partum, the mother-infant pairs were randomly assigned to maternal triple antiretroviral treatment or infant nevirapine during breastfeeding. HIV-unexposed and uninfected children matched for age, sex, and socioeconomic background were enrolled at vaccination and well-child clinics at the study sites. We included only children without a history of documented brain infection or injury or substantial malnutrition, and whose mothers were randomly assigned and maintained within their assigned ante-partum and post-partum phases throughout their treatment arm periods. Primary outcomes were the Mullen Scales of Early Learning (MSEL) cognitive composite score at age 12 months, 24 months, and 48 months; and the mental processing index for the Kaufman Assessment Battery for Children, second edition (KABC-II) global score at 48 months and 60 months. Repeated measures were analysed using a linear mixed-effects model controlling for data collection site., Findings: Between Aug 23, 2013, and Dec 17, 2014, we co-enrolled 861 children. For MSEL assessments, 738 were eligible for inclusion at age 12 months, 790 at age 24 months, and 692 at age 48 months. For KABC-II assessments, 685 were eligible for inclusion at age 48 months and 445 at age 60 months. There were no differences in MSEL cognitive composite scores according to exposure at age 12 and 24 months (p=0·19 and 0·24, respectively, for comparison of all groups). At 48 months, MSEL cognitive composite scores were worse for children of mothers who did not remain on triple antiretroviral treatment throughout both the ante-partum and post-partum treatment phases (adjusted means 80·64 [95% CI 77·74-83·54] and 81·34 [78·19-84·48], respectively), compared with those who did remain on triple treatment (adjusted mean 85·93, 95% CI 83·05-88·80; p=0·0486 for the comparison of all groups). The KABC-II composite scores (mental processing index) did not differ at 48 or 60 months according to exposure (p=0·81 and 0·89, respectively, for comparison of all groups). Scores for MSEL and KABC-II for children of mothers on triple antiretrovirals in both the ante-partum and post-partum treatment phases were similar to those for children in the HIV-unexposed and uninfected reference group at all timepoints., Interpretation: Maternal triple antiretroviral exposure during both the ante-partum and post-partum phases did not result in greater developmental risks for the mothers' HIV-exposed and uninfected children through age 60 months, compared with children who were HIV-unexposed and uninfected. This might be because ante-partum triple antiretroviral protection of the health of mothers with HIV during pregnancy might be neuroprotective for the child, and when continued post partum, could enhance the quality of caregiving for the child through better clinical care for the mother., Funding: National Institutes of Health and Eunice Kennedy Shriver National Institute of Child Health and Human Development., (Copyright © 2019 Elsevier Ltd. All rights reserved.)
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- 2019
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45. Immediate Transfusion in African Children with Uncomplicated Severe Anemia.
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Maitland K, Kiguli S, Olupot-Olupot P, Engoru C, Mallewa M, Saramago Goncalves P, Opoka RO, Mpoya A, Alaroker F, Nteziyaremye J, Chagaluka G, Kennedy N, Nabawanuka E, Nakuya M, Namayanja C, Uyoga S, Kyeyune Byabazaire D, M'baya B, Wabwire B, Frost G, Bates I, Evans JA, Williams TN, George EC, Gibb DM, and Walker AS
- Subjects
- Anemia complications, Anemia mortality, Child, Child, Preschool, Cost-Benefit Analysis, Female, Follow-Up Studies, Health Care Costs, Humans, Infant, Length of Stay economics, Malaria complications, Malawi epidemiology, Male, Patient Readmission statistics & numerical data, Transfusion Reaction epidemiology, Uganda epidemiology, Anemia therapy, Blood Transfusion economics, Hemoglobins analysis, Time-to-Treatment
- Abstract
Background: The World Health Organization recommends not performing transfusions in African children hospitalized for uncomplicated severe anemia (hemoglobin level of 4 to 6 g per deciliter and no signs of clinical severity). However, high mortality and readmission rates suggest that less restrictive transfusion strategies might improve outcomes., Methods: In this factorial, open-label, randomized, controlled trial, we assigned Ugandan and Malawian children 2 months to 12 years of age with uncomplicated severe anemia to immediate transfusion with 20 ml or 30 ml of whole-blood equivalent per kilogram of body weight, as determined in a second simultaneous randomization, or no immediate transfusion (control group), in which transfusion with 20 ml of whole-blood equivalent per kilogram was triggered by new signs of clinical severity or a drop in hemoglobin to below 4 g per deciliter. The primary outcome was 28-day mortality. Three other randomizations investigated transfusion volume, postdischarge supplementation with micronutrients, and postdischarge prophylaxis with trimethoprim-sulfamethoxazole., Results: A total of 1565 children (median age, 26 months) underwent randomization, with 778 assigned to the immediate-transfusion group and 787 to the control group; 984 children (62.9%) had malaria. The children were followed for 180 days, and 71 (4.5%) were lost to follow-up. During the primary hospitalization, transfusion was performed in all the children in the immediate-transfusion group and in 386 (49.0%) in the control group (median time to transfusion, 1.3 hours vs. 24.9 hours after randomization). The mean (±SD) total blood volume transfused per child was 314±228 ml in the immediate-transfusion group and 142±224 ml in the control group. Death had occurred by 28 days in 7 children (0.9%) in the immediate-transfusion group and in 13 (1.7%) in the control group (hazard ratio, 0.54; 95% confidence interval [CI], 0.22 to 1.36; P = 0.19) and by 180 days in 35 (4.5%) and 47 (6.0%), respectively (hazard ratio, 0.75; 95% CI, 0.48 to 1.15), without evidence of interaction with other randomizations (P>0.20) or evidence of between-group differences in readmissions, serious adverse events, or hemoglobin recovery at 180 days. The mean length of hospital stay was 0.9 days longer in the control group., Conclusions: There was no evidence of differences in clinical outcomes over 6 months between the children who received immediate transfusion and those who did not. The triggered-transfusion strategy in the control group resulted in lower blood use; however, the length of hospital stay was longer, and this strategy required clinical and hemoglobin monitoring. (Funded by the Medical Research Council and Department for International Development; TRACT Current Controlled Trials number, ISRCTN84086586.)., (Copyright © 2019 Massachusetts Medical Society.)
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- 2019
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46. Brain MRI and cognitive function seven years after surviving an episode of severe acute malnutrition in a cohort of Malawian children.
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Lelijveld N, Jalloh AA, Kampondeni SD, Seal A, Wells JC, Goyheneix M, Chimwezi E, Mallewa M, Nyirenda MJ, Heyderman RS, and Kerac M
- Subjects
- Brain pathology, Child, Child, Preschool, Educational Status, Female, Humans, Infant, Longitudinal Studies, Malawi, Male, Mental Status and Dementia Tests, Prospective Studies, Severe Acute Malnutrition diagnostic imaging, Severe Acute Malnutrition pathology, Brain diagnostic imaging, Cognition, Magnetic Resonance Imaging methods, Severe Acute Malnutrition psychology, Survivors psychology
- Abstract
Objective: To assess differences in cognition functions and gross brain structure in children seven years after an episode of severe acute malnutrition (SAM), compared with other Malawian children., Design: Prospective longitudinal cohort assessing school grade achieved and results of five computer-based (CANTAB) tests, covering three cognitive domains. A subset underwent brain MRI scans which were reviewed using a standardized checklist of gross abnormalities and compared with a reference population of Malawian children., Setting: Blantyre, Malawi.ParticipantsChildren discharged from SAM treatment in 2006 and 2007 (n 320; median age 9·3 years) were compared with controls: siblings closest in age to the SAM survivors and age/sex-matched community children., Results: SAM survivors were significantly more likely to be in a lower grade at school than controls (adjusted OR = 0·4; 95 % CI 0·3, 0·6; P < 0·0001) and had consistently poorer scores in all CANTAB cognitive tests. Adjusting for HIV and socio-economic status diminished statistically significant differences. There were no significant differences in odds of brain abnormalities and sinusitis between SAM survivors (n 49) and reference children (OR = 1·11; 95 % CI 0·61, 2·03; P = 0·73)., Conclusions: Despite apparent preservation in gross brain structure, persistent impaired school achievement is likely to be detrimental to individual attainment and economic well-being. Understanding the multifactorial causes of lower school achievement is therefore needed to design interventions for SAM survivors to thrive in adulthood. The cognitive and potential economic implications of SAM need further emphasis to better advocate for SAM prevention and early treatment.
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- 2019
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47. Hypoallergenic and anti-inflammatory feeds in children with complicated severe acute malnutrition: an open randomised controlled 3-arm intervention trial in Malawi.
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Bartels RH, Chimwezi E, Watson V, Pei L, Potani I, Allubha B, Chidzalo K, Wang D, Dube Q, Mallewa M, Allen A, Bandsma RHJ, Voskuijl WP, and Allen SJ
- Subjects
- Biomarkers metabolism, Feces, Female, Humans, Infant, Inflammation immunology, Inflammation metabolism, Inflammation prevention & control, Leukocyte L1 Antigen Complex, Malawi, Male, Severe Acute Malnutrition immunology, Infant Food, Severe Acute Malnutrition metabolism, Severe Acute Malnutrition prevention & control
- Abstract
Intestinal pathology in children with complicated severe acute malnutrition (SAM) persists despite standard management. Given the similarity with intestinal pathology in non-IgE mediated gastrointestinal food allergy and Crohn's disease, we tested whether therapeutic feeds effective in treating these conditions may benefit children with complicated SAM. After initial clinical stabilisation, 95 children aged 6-23 months admitted at Queen Elizabeth Central Hospital, Blantyre, Malawi between January 1
st and December 31st , 2016 were allocated randomly to either standard feeds, an elemental feed or a polymeric feed for 14 days. Change in faecal calprotectin as a marker of intestinal inflammation and the primary outcome was similar in each arm: elemental vs. standard 4.1 μg/mg stool/day (95% CI, -29.9, 38.15; P = 0.81) and polymeric vs. standard 10 (-23.96, 43.91; P = 0.56). Biomarkers of intestinal and systemic inflammation and mucosal integrity were highly abnormal in most children at baseline and abnormal values persisted in all three arms. The enteropathy in complicated SAM did not respond to either standard feeds or alternative therapeutic feeds administered for up to 14 days. A better understanding of the pathogenesis of the gut pathology in complicated SAM is an urgent priority to inform the development of improved therapeutic interventions.- Published
- 2019
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48. Pregnancy Outcomes in the Era of Universal Antiretroviral Treatment in Sub-Saharan Africa (POISE Study).
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Dadabhai S, Gadama L, Chamanga R, Kawalazira R, Katumbi C, Makanani B, Dula D, Hua N, Lau B, Mallewa M, and Taha TE
- Subjects
- Adult, Drug Administration Schedule, Female, HIV Infections transmission, Humans, Infant, Newborn, Malawi epidemiology, Pregnancy, Pregnancy Complications, Infectious epidemiology, Pregnancy Complications, Infectious prevention & control, Pregnancy Outcome, Prospective Studies, Socioeconomic Factors, Anti-Retroviral Agents therapeutic use, HIV Infections drug therapy, Infectious Disease Transmission, Vertical prevention & control, Pregnancy Complications, Infectious drug therapy
- Abstract
Background: Adverse pregnancy outcomes such as preterm birth (PTB), low birth weight (LBW), and small for gestational age (SGA) remain major global problems. We compared pregnancy outcomes among HIV-infected women receiving antiretroviral treatment (ART) and with CD4 ≥350 cells, and HIV-uninfected women to assess whether disparities associated with HIV infection have been eliminated through use of ART., Setting: Observational study conducted at 5 health facilities in Blantyre, Malawi, during 2016-2017., Methods: HIV-infected women receiving the national ART regimen (efavirenz + lamivudine + tenofovir) and HIV-uninfected women were consented and enrolled at delivery. Data collected included sociodemographic and clinical; gestational age; BW; infant/maternal anthropometry; and laboratory results. We defined PTB as GA <37 weeks; LBW as BW <2·5 kg; and SGA as BW <10th percentile of GA. SGA infants were classified into proportionate and disproportionate based on ponderal index. Descriptive, stratified, and multivariate logistic and linear regression analyses were used., Results: Of 5423 women approached, 614 HIV-infected and 685 HIV-uninfected women were enrolled. Rates of PTB, LBW, and SGA were 10.6%, 7.2%, and 17.1% among HIV-infected women on ART and 9.5%, 5.0%, and 18.4% among HIV-uninfected women, respectively. None of these differences were statistically significant in univariate- or multivariate-adjusted analyses (P > 0.05). Of 231 SGA infants, 78.8% were proportionate and 21% were disproportionate. Of the 614 HIV-infected women on ART, 75% had undetectable virus at delivery., Conclusions: ART use has reduced the high rates of adverse pregnancy outcomes among HIV-infected women. However, the rates remain high irrespective of HIV infection and require appropriate interventions.
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- 2019
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49. Parasitic and parachute research in global health.
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Harawa PP, Mbale E, Mallewa M, Dube Q, Langton J, Njiram'madzi J, Kumwenda B, Bandsma R, and Voskuijl W
- Subjects
- Animals, Research, Global Health, Parasites
- Published
- 2018
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50. The Treatment of Possible Severe Infection in Infants: An Open Randomized Safety Trial of Parenteral Benzylpenicillin and Gentamicin Versus Ceftriaxone in Infants <60 days of Age in Malawi.
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Molyneux EM, Dube Q, Banda FM, Chiume M, Singini I, Mallewa M, Schwalbe EC, and Heyderman RS
- Subjects
- Bilirubin blood, Hearing Loss, Humans, Infant, Infant, Newborn, Malawi, Meningitis, Bacterial epidemiology, Neonatal Sepsis epidemiology, Treatment Outcome, Anti-Bacterial Agents adverse effects, Anti-Bacterial Agents therapeutic use, Ceftriaxone adverse effects, Ceftriaxone therapeutic use, Gentamicins adverse effects, Gentamicins therapeutic use, Meningitis, Bacterial drug therapy, Neonatal Sepsis drug therapy, Penicillin G adverse effects, Penicillin G therapeutic use
- Abstract
Background: The World Health Organization recommends benzylpenicillin and gentamicin as antimicrobial treatment for infants with sepsis in low-income settings, and ceftriaxone or cefotaxime as an alternative. In a meta-analysis from 13 low-income settings, Staphylococcus aureus, Klebsiella spp. and Escherichia coli accounted for 55% of infants with sepsis. In a review of bacterial meningitis, resistance to third generation cephalosporins was >50% of all isolates, and 44% of Gram-negative isolates were gentamicin resistant. However, ceftriaxone may cause neonatal jaundice, and gentamicin may cause deafness. Therefore, we compared parenteral benzylpenicillin plus gentamicin with ceftriaxone as first-line treatment, assessing outcome and adverse events., Methods: This was an open randomized trial carried out in the Queen Elizabeth Central Hospital, Blantyre, Malawi, from 2010 to 2013. Infants <60 days of age with possible severe sepsis received either benzylpenicillin and gentamicin or ceftriaxone. Adverse events and outcomes were recorded until 6 months post discharge., Results: Three-hundred forty-eight infants were included in analyses. Outcome in the benzylpenicillin and gentamicin and ceftriaxone groups was similar; deaths were 13.7% and 16.5% and sequelae were 14.5% and 11.2%, respectively. More infants in the penicillin/gentamicin group required phototherapy: 15% versus 5%, P = 0.03. Thirteen (6%) survivors had bilateral hearing loss. There was no difference between the treatment groups. By 6 months post discharge, 11 more infants had died, and 17 more children were found to have sequelae., Conclusions: Ceftriaxone and gentamicin are safe for infants in our setting. Infants should receive long-term follow-up as many poor outcomes occurred after hospital discharge.
- Published
- 2017
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