17 results on '"Ibikounle, Moudachirou"'
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2. Groundwater biodiversity and water quality of wells in the Southern region of Benin
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Lagnika, Moïssou, Ibikounle, Moudachirou, Boutin, Claude, and Sakiti, et Nestor G.
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- 2016
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3. Assessment of treatment impact on lymphatic filariasis in 13 districts of Benin: progress toward elimination in nine districts despite persistence of transmission in some areas
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Boko-Collins, Pelagie M., Ogouyemi-Hounto, Aurore, Adjinacou-Badou, Elvire G., Gbaguidi-Saizonou, Laurinda, Dossa, Nissou Ines, Dare, Aboudou, Ibikounle, Moudachirou, Zoerhoff, Kathryn L., Cohn, Daniel A., and Batcho, Wilfrid
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- 2019
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4. Anogeissus leiocarpus (DC.) Guill and Peer (Combretaceae) and Adansonia digitata L. (Malvaceae), Tropical Medicinal Plants Traditionally Used for the Management of Gastro-intestinal Parasitosis of Small Ruminants: Chemical Composition Study
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Patrick A. Edorh, Sévérin Babatounde, Christian Cocou Dansou, Julienne Kuiseu, Claude Gbemeho Houssoukpe, Pascal Abiodoun Olounlade, Geraldo Tchegniho Houmenou, Tony Taofick Babalola Abiodoun Sounkere, Basile Saka Boni Konmy, Sylvie Hounzangbe-Adote, and Ibikounle Moudachirou
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Anogeissus ,Combretaceae ,biology ,Traditional medicine ,General Materials Science ,biology.organism_classification ,Adansonia digitata ,Medicinal plants ,Malvaceae ,Gastro intestinal - Published
- 2021
5. It depends on how you tell: a qualitative diagnostic analysis of the implementation climate for community-wide mass drug administration for soil-transmitted helminth
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Avokpaho, Euripide, primary, Lawrence, Sarah, additional, Roll, Amy, additional, Titus, Angelin, additional, Jacob, Yesudoss, additional, Puthupalayam Kaliappan, Saravanakumar, additional, Gwayi-Chore, Marie Claire, additional, Chabi, Félicien, additional, Togbevi, Comlanvi Innocent, additional, Elijan, Abiguel Belou, additional, Nindi, Providence, additional, Walson, Judd L, additional, Ajjampur, Sitara Swarna Rao, additional, Ibikounle, Moudachirou, additional, Kalua, Khumbo, additional, Aruldas, Kumudha, additional, and Means, Arianna Rubin, additional
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- 2022
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6. Soil-transmitted helminth infection in pregnancy and long-term child neurocognitive and behavioral development: A prospective mother-child cohort in Benin
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Garrison, Amanda, Boivin, Michael, Khoshnood, Babak, Courtin, David, Alao, Jules, Mireku, Michael, Ibikounle, Moudachirou, Massougbodji, Achille, Cot, Michel, Bodeau-Livinec, Florence, Centre de Recherche Épidémiologie et Statistique Sorbonne Paris Cité (CRESS (U1153 / UMR_A_1125 / UMR_S_1153)), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Université Sorbonne Paris Cité (USPC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), École des Hautes Études en Santé Publique [EHESP] (EHESP), Département Méthodes quantitatives en santé publique (METIS), Michigan State University [East Lansing], Michigan State University System, Mère et enfant en milieu tropical : pathogènes, système de santé et transition épidémiologique (MERIT - UMR_D 216), Institut de Recherche pour le Développement (IRD)-Université Paris Cité (UPCité), Centre Hospitalier Universitaire de la Mère et de l'Enfant Lagune (CHU-MEL), University of Lincoln, Université d’Abomey-Calavi = University of Abomey Calavi (UAC), Fondation de France (2015 00060746), Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD- R21-HD060524), European and Developing Countries Clinical Trials Partnership (EDCTP- IP.07.31080.002), Bill and Melinda Gates Foundation, EHESP, SCD, Mère et enfant en milieu tropical : pathogènes, système de santé et transition épidémiologique (MERIT - UMR_D 261), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Université Sorbonne Paris Cité (USPC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Paris (UP)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut de Recherche pour le Développement (IRD)-Université de Paris (UP), and Université d’Abomey-Calavi (UAC)
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Maternal Health ,Emotions ,RC955-962 ,Helminthiasis ,Child Behavior ,Social Sciences ,Cohort Studies ,C890 Psychology not elsewhere classified ,Soil ,Families ,C810 Applied Psychology ,Child Development ,Cognition ,Medical Conditions ,Pregnancy ,[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases ,Arctic medicine. Tropical medicine ,Medicine and Health Sciences ,Psychology ,Prospective Studies ,C820 Developmental Psychology ,Child ,Children ,Immune Response ,Cognitive Neurology ,Neuropsychological testing ,Eukaryota ,Obstetrics and Gynecology ,[SDV.NEU.SC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences ,Cognitive impairment ,Neurology ,[SDV.MHEP.MI] Life Sciences [q-bio]/Human health and pathology/Infectious diseases ,Female ,Public aspects of medicine ,RA1-1270 ,B990 Subjects Allied to Medicine not elsewhere classified ,Research Article ,Adult ,Helminth infections ,Cognitive Neuroscience ,Immunology ,[SDV.MHEP.GEO]Life Sciences [q-bio]/Human health and pathology/Gynecology and obstetrics ,Signs and Symptoms ,[SDV.MHEP.PED] Life Sciences [q-bio]/Human health and pathology/Pediatrics ,Helminths ,Parasitic Diseases ,Humans ,Animals ,Inflammation ,[SDV.MHEP.PED]Life Sciences [q-bio]/Human health and pathology/Pediatrics ,Organisms ,Biology and Life Sciences ,Invertebrates ,[SDV.MHEP.GEO] Life Sciences [q-bio]/Human health and pathology/Gynecology and obstetrics ,Age Groups ,Hookworms ,[SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie ,Pregnancy Complications, Parasitic ,People and Places ,Women's Health ,Cognitive Science ,Population Groupings ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,Clinical Medicine ,Zoology ,[SDV.NEU.SC] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences ,Neuroscience - Abstract
Background An estimated 30% of women in Sub-Saharan Africa suffer from soil-transmitted helminth infection during pregnancy (SHIP), which has been shown to increase risk of pre-term birth, low birth weight, and maternal anemia. A previous study in Benin found that SHIP was associated with impaired cognitive and gross motor development scores in 635 one-year-old children. The objective of the present study was to follow children prospectively to investigate whether the association between SHIP and child neurocognitive and behavioral development persisted at age six. Principal findings Our prospective child cohort included 487 live-born singletons of pregnant women enrolled in the Malaria in Pregnancy Preventive Alternative Drugs clinical trial in Allada, Benin. SHIP was assessed at three antenatal visits (ANVs) through collection and testing of stool samples. Neurocognitive and behavioral development was assessed in six-year-old children by trained investigators using the Kaufman Assessment Battery for Children 2nd edition and the parent-reported Strengths and Difficulties Questionnaire (SDQ). Multiple linear regression models generated coefficients and 95% confidence intervals and potential mediating factors were tested. Prevalence of SHIP was 13% at the 1st ANV, 9% at the 2nd ANV, and 1% at delivery. SHIP was not associated with low neurocognitive scores in children at six years. Higher SDQ internalizing scores, indicating increased emotional impairments in children, were associated with helminth infection at the 2nd ANV/delivery 1.07 (95% CI 0.15, 2.00) and at least once during pregnancy 0.79 (95% CI 0.12, 1.46) in adjusted models. Mediation analysis did not reveal significant indirect effects of several mediators on this association. Conclusions Our study shows that while SHIP is not associated with impaired long-term neurocognitive development, infections may have significant negative impacts on emotional development in six-year-old children. SHIP remains a critical public health issue, and adequate prevention and treatment protocols should be enforced in low- and middle-income countries., Author summary Soil-transmitted helminth infections impact 1.5 billion individuals, primarily in low- and middle- income countries, each year and contribute to malnutrition, anemia, and impaired neurocognitive development in children. However, these infections in pregnancy and their impact on offspring have been less studied. One previous study found associations between soil-transmitted helminth infection during pregnancy and impaired cognitive functioning in offspring one year after birth. The current study aimed to follow these children prospectively until six years in order to confirm whether these associations persisted or not. Infections during pregnancy were no longer associated with cognitive or motor functioning in children; however, infections were associated with impaired behavioral development. Animal-based models have hypothesized maternal inflammation and poor birth outcomes to be the mechanisms behind this relationship; however, our findings did not support these mechanisms. This is one of very few prospective cohort studies in Sub-Saharan Africa to investigate these associations, and more research is needed to corroborate results. Limitations include limited power and the possibility that results are due to chance from multiple statistical tests. Adequate and accessible prevention and treatment efforts in pregnancy and childhood should be provided to populations in low- and middle- income countries at high risk of infection.
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- 2021
7. Baseline patterns of infection in regions of Benin, Malawi and India seeking to interrupt transmission of soil transmitted helminths (STH) in the DeWorm3 trial
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Gilles Cottrell, SARAVANAKUMAR KALIAPPAN, IBIKOUNLE Moudachirou, Hugo Legge, KHUMBO KALUA, Robert J. Hardwick, Rachel Pullan, Kristjana Asbjornsdottir, William Oswald, Malathi Manuel, and Katherine Halliday
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Malawi ,Trichuris ,Physiology ,Eggs ,RC955-962 ,Helminthiasis ,Force of infection ,Deworming ,Geographical Locations ,Soil ,Medical Conditions ,Reproductive Physiology ,Arctic medicine. Tropical medicine ,Epidemiology ,Medicine and Health Sciences ,Prevalence ,Medicine ,Benin ,Cluster randomised controlled trial ,Intestinal Diseases, Parasitic ,Child ,Anthelmintics ,education.field_of_study ,biology ,Eukaryota ,Middle Aged ,Infectious Diseases ,Helminth Infections ,Research Design ,Mass Drug Administration ,Public aspects of medicine ,RA1-1270 ,Research Article ,Adult ,medicine.medical_specialty ,Census ,Asia ,Adolescent ,Population ,India ,Research and Analysis Methods ,Young Adult ,Helminths ,parasitic diseases ,Parasitic Diseases ,Animals ,Humans ,education ,Survey Research ,business.industry ,Ascaris ,Public Health, Environmental and Occupational Health ,Organisms ,Biology and Life Sciences ,biology.organism_classification ,Invertebrates ,Hookworms ,Age Groups ,Hookworm Infections ,People and Places ,Africa ,Population Groupings ,business ,Zoology ,Demography - Abstract
Global efforts to control morbidity associated with soil-transmitted helminth infections (STH) have focused largely on the targeted treatment of high-risk groups, including children and pregnant women. However, it is not clear when such programs can be discontinued and there are concerns about the sustainability of current STH control programs. The DeWorm3 project is a large multi-country community cluster randomized trial in Benin, India and Malawi designed to determine the feasibility of interrupting the transmission of STH using community-wide delivery of mass drug administration (MDA) with anthelmintics over multiple rounds. Here, we present baseline data and estimate key epidemiological parameters important in determining the likelihood of transmission interruption in the DeWorm3 trial. A baseline census was conducted in October-December 2017 in India, November-December 2017 in Malawi and in January-February 2018 in Benin. The baseline census enumerated all members of each household and collected demographic data and information on occupation, assets, and access to water, sanitation and hygiene (WASH). Each study site was divided into 40 clusters of at least 1,650 individuals per cluster. Clusters were randomized to receive twice yearly community-wide MDA with albendazole (GSK) targeting eligible individuals of all ages (20 clusters), or to receive the standard-of-care deworming program targeting children provided in each country. In each site, a randomly selected group of 150 individuals per cluster (6,000 total per site) was selected from the baseline census using stratified random sampling, and each individual provided a single stool sample for analysis of STH infection using the Kato-Katz technique. Study site, household and individual characteristics were summarized as appropriate. We estimated key epidemiological parameters including the force of infection and the degree of parasite aggregation within the population. The DeWorm3 sites range in population from 94,969 to 140,932. The population age distribution varied significantly by site, with the highest proportion of infants and young children in Malawi and the highest proportion of adults in India. The baseline age- and cluster-weighted prevalence, as measured by Kato-Katz, varied across sites and by species, Baseline hookworm prevalence in India was 21.4% (95% CI: 20.4–22.4%), while prevalence of Ascaris and Trichuris by Kato-Katz was low (0.1% and 0.3% overall). In Malawi, the overall age- and cluster-weighted STH prevalence was 7.7% (95% CI: 7.1–8.4%) predominantly driven by hookworm infections (7.4%) while Ascaris (0.1%) and Trichuris (0.3%) infections were rare. In Benin, the overall age- and cluster-weighted prevalence was significantly lower (5.6%, 95% CI: 5.1–6.2%) and Ascaris (2.0%, 95% CI: 1.6–2.3%) was more common than in other sites. Ascaris infections were more likely to be moderate- or heavy-intensity (43.7%, unweighted) compared to hookworm (5.0%). The force of infection for hookworm was highest in adults in India and Malawi but appeared relatively stable across age groups in Benin. These data demonstrate the significant variability between the sites in terms of demography, socio-economic status and environmental characteristics. In addition, the baseline prevalence and intensity data from DeWorm3 suggest that each site has unique epidemiologic characteristics that will be critical in determining correlates of achieving STH transmission interruption in the DeWorm3 trial. Trial registration: The trial was registered at ClinicalTrials.gov (NCT03014167)., Author summary Intestinal parasitic worms, soil-transmitted helminths, are among the most common infectious organisms of humans. In many low-resource settings, these infections result in considerable morbidity, including reductions in childhood growth and development, increased risk of anemia and reductions in future educational achievement and income earning potential. The current global strategy for controlling these infections is through routine deworming of school and pre-school aged children as well as pregnant women. Since many adults and non-school going children are infected with these parasites, the current strategy does not prevent the rapid reinfection of individuals despite repeated treatment. The DeWorm3 trial is a large multi-country trial being conducted in Benin, India and Malawi to test the feasibility of using mass drug administration of deworming medications to all individuals in a community to interrupt these infections in some geographic areas. Here we present baseline data from these communities and estimate the transmission potential of these infections at each of the sites.
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- 2020
8. Impacts des Hydrocarbures Aromatiques Polycycliques sur les poissons: Cas des Tilapias du lac Nokoué au Sud du Bénin (Afrique de l’Ouest)
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Dovonou, Flavien Edia, primary, Ibikounle, Moudachirou, additional, Akouedegni, Coovi Guénolé, additional, Aissi, Valdina, additional, Prudence Dossou, Mahutondji, additional, and Mama, Daouda, additional
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- 2019
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9. Evaluating the sustainability, scalability, and replicability of an STH transmission interruption intervention : the DeWorm3 implementation science protocol
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Means, Arianna Rubin, Ajjampur, Sitara SR, Bailey, Robin, Galactionova, Katya, Gwayi-Chore, Marie-Claire, Halliday, Katherine, Ibikounle, Moudachirou, Juvekar, Sanjay, Kalua, Khumbo, Kang, Gagandeep, Lele, Pallavi, Luty, Adrian JF, Pullan, Rachel, Sarkar, Rajiv, Schär, Fabian, Tediosi, Fabrizio, Weiner, Bryan J, Yard, Elodie, Walson, Judd, and DeWorm3 Implementation Science Team
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lcsh:Arctic medicine. Tropical medicine ,lcsh:RC955-962 ,lcsh:Public aspects of medicine ,lcsh:RA1-1270 - Abstract
Hybrid trials that include both clinical and implementation science outcomes are increasingly relevant for public health researchers that aim to rapidly translate study findings into evidence- based practice. The DeWorm3 Project is a series of hybrid trials testing the feasibility of interrupting the transmission of soil transmitted helminths (STH), while conducting implementation science research that contextualizes clinical research findings and provides guidance on opportunities to optimize delivery of STH interventions. The purpose of DeWorm3 implementation science studies is to ensure rapid and efficient translation of evidence into practice. DeWorm3 will use stakeholder mapping to identify individuals who influence or are influenced by school-based or community-wide mass drug administration (MDA) for STH and to evaluate network dynamics that may affect study outcomes and future policy development. Individual interviews and focus groups will generate the qualitative data needed to identify factors that shape, contextualize, and explain DeWorm3 trial outputs and outcomes. Structural readiness surveys will be used to evaluate the factors that drive health system readiness to implement novel interventions, such as community-wide MDA for STH, in order to target change management activities and identify opportunities for sustaining or scaling the intervention. Process mapping will be used to understand what aspects of the intervention are adaptable across heterogeneous implementation settings and to identify contextually- relevant modifiable bottlenecks that may be addressed to improve the intervention delivery process and to achieve intervention outputs. Lastly, intervention costs and incremental cost-effectiveness will be evaluated to compare the efficiency of community-wide MDA to standard-of-care targeted MDA both over the duration of the trial and over a longer elimination time horizon.
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- 2018
10. DNA barcoding and diversity of groundwater oligochaetes in Benin (West Africa)
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Martin, Patrick J., Lagnika, Moissou, Sonet, Gontran, and Ibikounle, Moudachirou
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Biodiversity -- Observations ,Clitellata -- Genetic aspects -- Distribution ,DNA barcoding -- Methods ,Company distribution practices ,Biological sciences - Abstract
Background: Groundwater is a major ecosystem in terms of biodiversity, endemism, and relict species. However, its stygofauna, the obligate groundwater fauna, remains too often ignored, although present on all continents. [...]
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- 2017
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11. Experimental study of the coccidial infection on growth performance of juvenile of Clarias gariepinus Burchell, 1822 (Poisson, Siluriformes)
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IBIKOUNLE, Moudachirou, primary, HOUENOU, Mireille Sèdogbo, additional, GBANKOTO, Adam, additional, TOKO, Ibrahim IMOROU, additional, and TOSSAVI, Darius Nounagnon, additional
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- 2018
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12. Initiating NTD programs targeting schistosomiasis and soil-transmitted helminthiasis in two provinces of the Democratic Republic of the Congo: Establishment of baseline prevalence for mass drug administration
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Kabore, Achille, primary, Ibikounle, Moudachirou, additional, Tougoue, Jean Jacques, additional, Mupoyi, Sylvain, additional, Ndombe, Martin, additional, Shannon, Scott, additional, Ottesen, Eric A., additional, Mukunda, Faustin, additional, and Awaca, Naomi, additional
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- 2017
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13. P047 HLA-G and HLA-E variable sites are associated with susceptibility to P. falciparum malaria in beninese toffin children
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Sonon, Paulin, Tokplonou, Léonidas, Sadissou, Ibrahim, M’po, Kuumaaté K., Glitho, Sonya S., Ibikounlé, Moudachirou, da Paz, Michelle Almeida, Massaro, Juliana Doblas, Gonzalez, Daniel, Massougbodji, Achille, Moreau, Philippe, Garcia, André, Milet, Jacqueline, Sabbagh, Audrey, Mendes-Junior, Celso T., Moutairou, Kabirou A., Castelli, Erick C., Courtin, David, and Donadi, Eduardo A.
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- 2019
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14. Schistosomiasis and Soil Transmitted Helminths Distribution in Benin: A Baseline Prevalence Survey in 30 Districts
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Boko, Pelagie M., primary, Ibikounle, Moudachirou, additional, Onzo-Aboki, Ablawa, additional, Tougoue, Jean-Jacques, additional, Sissinto, Yollande, additional, Batcho, Wilfrid, additional, Kinde-Gazard, Dorothe, additional, and Kabore, Achille, additional
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- 2016
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15. Assessing the feasibility of interrupting the transmission of soil-transmitted helminths through mass drug administration: The DeWorm3 cluster randomized trial protocol.
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Ásbjörnsdóttir, Kristjana Hrönn, Ajjampur, Sitara S. Rao, Anderson, Roy M., Bailey, Robin, Gardiner, Iain, Halliday, Katherine E., Ibikounle, Moudachirou, Kalua, Khumbo, Kang, Gagandeep, Littlewood, D. Timothy J., Luty, Adrian J. F., Means, Arianna Rubin, Oswald, William, Pullan, Rachel L., Sarkar, Rajiv, Schär, Fabian, Szpiro, Adam, Truscott, James E., Werkman, Marleen, and Yard, Elodie
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HELMINTHIASIS ,DRUG administration ,RANDOMIZED controlled trials ,POLYMERASE chain reaction ,DISEASE prevalence ,FEASIBILITY studies ,INFECTIOUS disease transmission - Abstract
Current control strategies for soil-transmitted helminths (STH) emphasize morbidity control through mass drug administration (MDA) targeting preschool- and school-age children, women of childbearing age and adults in certain high-risk occupations such as agricultural laborers or miners. This strategy is effective at reducing morbidity in those treated but, without massive economic development, it is unlikely it will interrupt transmission. MDA will therefore need to continue indefinitely to maintain benefit. Mathematical models suggest that transmission interruption may be achievable through MDA alone, provided that all age groups are targeted with high coverage. The DeWorm3 Project will test the feasibility of interrupting STH transmission using biannual MDA targeting all age groups. Study sites (population ≥80,000) have been identified in Benin, Malawi and India. Each site will be divided into 40 clusters, to be randomized 1:1 to three years of twice-annual community-wide MDA or standard-of-care MDA, typically annual school-based deworming. Community-wide MDA will be delivered door-to-door, while standard-of-care MDA will be delivered according to national guidelines. The primary outcome is transmission interruption of the STH species present at each site, defined as weighted cluster-level prevalence ≤2% by quantitative polymerase chain reaction (qPCR), 24 months after the final round of MDA. Secondary outcomes include the endline prevalence of STH, overall and by species, and the endline prevalence of STH among children under five as an indicator of incident infections. Secondary analyses will identify cluster-level factors associated with transmission interruption. Prevalence will be assessed using qPCR of stool samples collected from a random sample of cluster residents at baseline, six months after the final round of MDA and 24 months post-MDA. A smaller number of individuals in each cluster will be followed with annual sampling to monitor trends in prevalence and reinfection throughout the trial. Trial registration: ClinicalTrials.gov [ABSTRACT FROM AUTHOR]
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- 2018
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16. Schistosomiasis in Benin (West Africa): epidemiology and ecology of the host-parasite interactions
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Ibikounle, Moudachirou, Modat, Anne, Université d’Abomey-Calavi (UAC), Université de Perpignan Via Domitia (UPVD), Université de Perpignan Via Domitia, Université d'Abomey-Calavi (Bénin), Hélène Moné, and Nestor G. Sakiti
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Interactions hôte-Parasite ,mollusques vecteurs ,Ecology ,Epidemiology ,[SDV.EE.IEO] Life Sciences [q-bio]/Ecology, environment/Symbiosis ,écologie ,[SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology ,S. haematobium ,host-parasite interactions ,[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases ,[SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie ,West Africa ,épidémiologie ,[SDV.BA.ZI] Life Sciences [q-bio]/Animal biology/Invertebrate Zoology ,[SDV.MHEP.MI] Life Sciences [q-bio]/Human health and pathology/Infectious diseases ,Benin ,Bénin ,Afrique de l'ouest ,[SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,S. mansoni ,Vector snails ,[SDV.MP.PAR] Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology ,[SDV.EE.IEO]Life Sciences [q-bio]/Ecology, environment/Symbiosis - Abstract
This work presents an epidemiological and an ecological study of schistosomiasis in Benin.At the epidemiological level, a bibliographical summary of the state of work carried out on schistosomiasis in the area of the Economic Community of West African States (ECOWAS) was reported. In Benin, our epidemiological analyzes confirmed the existence of two species of human schistosomes: S. haematobium and S. mansoni out of the five reported in the ECOWAS region in which Benin is located (S. haematobium, S. mansoni , S. guineensis, S. bovis and S. curassoni). The general prevalence obtained for S. haematobium is 85% and that of S; mansoni is 30% with the existence of foci of mixed transmission. Malacological surveys revealed the presence in Benin of at least five species of mollus that five vectors B. forskalii, B. globosus and B. truncatus, vectors of S. haematobium, B. pfeifferi, vector of S. mansoni and I. exustus , an exotic mollusk in Benin, known as a vector of S. indicum, S. spindale and S. nasale in Southeast Asia. We report the presence of I. exustus for the first time in Benin where this mollusk seems to be, for the moment, passive in the transmission of schistosomiasis.In terms of the ecology of mollusc-parasite interactions, our study has shown that the different populations of S. haematobium are differently compatible with three of the four groups of Bulinus molluscs: the africanus group, the forskalii group and the reticulatus group while the different populations of S. mansoni are all also compatible with B. pfeifferi. The analysis of six life history traits, prepatent period, prevalence, cercarial production in the parasite and growth, reproduction and survival of molluscs was approached with five local populations of schistosomes including three populations of S. haematobium (Doh, Sô -Tchanhoué and Toho-Todougba) and two populations of S. mansoni (Kpinnou and Toho-Todougba) and revealed that while the populations of S. haematobium appear to be adapted to a local vector, this is not the case in the S. mansoni species.In terms of the ecology of vertebrate-parasite interactions, our study revealed the existence of a particular hourly cercarial emission rate, of the infradian type, both in S. haematobium and in S. mansoni. The anthropic study carried out at one of the transmission foci (Toho-Todougba) where the two species are present has made it possible to observe a perfect synergy between the cercarial chronobiology and the dynamics of activities in humans: it could be act of a strategy developed by the parasite to maintain its appointments with its natural vertebrate host., Ce travail présente une étude épidémiologique et une étude des interactions hôte-parasite sur les schistosomoses au Bénin. Au plan épidémiologique, une synthèse bibliographique de l'état des travaux réalisés sur les schistosomoses dans l'espace de la Communauté Economique des Etats de l'Afrique de l'Ouest (CEDEAO) a été menée. Au Bénin, nos analyses épidémiologiques ont permis de confirmer l'existence de deux espèces de schistosomes humains : S. haematobium et S. mansoni sur les cinq signalées dans l'espace CEDEAO dans lequel le Bénin se situe (S. haematobium, S. mansoni, S. guineensis, S. bovis et S. curassoni). La prévalence générale obtenue pour S. haematobium est de 85% et celle de S; mansoni est de 30% avec l'existence de foyers de transmission mixtes. Les prospections malacologiques ont révélé la présence au Bénin d'au moins cinq espèces de mollusques potentiellement vectrices : B. forskalii, B. globosus et B. truncatus, vectrices de S. haematobium, B. pfeifferi, vectrice de S. mansoni et I. exustus, mollusque exotique au Bénin, connu comme vecteur de S. indicum, S. spindale et S. nasale en Asie du sud-est. Nous signalons la présence de I. exustus pour la première fois au Bénin où ce mollusque semble être, pour le moment, passif dans la transmission des schistosomoses. Au plan de l'écologie des interactions mollusque-parasite, notre étude a montré que les différentes populations de S. haematobium sont différemment compatibles avec trois des quatre groupes de mollusques Bulinus : le groupe africanus, le groupe forskalii et le groupe reticulatus alors que les différentes populations de S. mansoni sont toutes également compatibles avec B. pfeifferi. L'analyse de six traits d'histoire de vie, période prépatente, prévalence, production cercarienne chez le parasite et croissance, reproduction et survie des mollusques a été abordée avec cinq populations locales de schistosomes dont trois populations de S. haematobium (Doh, Sô-Tchanhoué et Toho-Todougba) et deux populations de S. mansoni (Kpinnou et Toho-Todougba) et a révélé que si les populations de S. haematobium semblent être adaptées à un vecteur local, ce n'est pas le cas chez l'espèce S. mansoni. Au plan de l'écologie des interactions vertébré-parasite, notre étude a révélé l'existence d'un rythme d'émission cercarienne horaire particulier, de type infradien, à la fois chez S. haematobium et chez S. mansoni. L'étude anthropique réalisée au niveau d'un des foyers de transmission (Toho-Todougba) où les deux espèces sont présentes a permis de constater une parfaite synergie entre la chronobiologie cercarienne et la dynamique des activités chez l'Homme : il pourrait s'agir d'une stratégie développée par le parasite pour maintenir ses rendez-vous avec son hôte naturel vertébré.
- Published
- 2006
17. Evaluating the sustainability, scalability, and replicability of an STH transmission interruption intervention: The DeWorm3 implementation science protocol.
- Author
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Means AR, Ajjampur SSR, Bailey R, Galactionova K, Gwayi-Chore MC, Halliday K, Ibikounle M, Juvekar S, Kalua K, Kang G, Lele P, Luty AJF, Pullan R, Sarkar R, Schär F, Tediosi F, Weiner BJ, Yard E, and Walson J
- Subjects
- Anthelmintics administration & dosage, Humans, Mass Drug Administration methods, Clinical Protocols, Clinical Trials as Topic, Disease Transmission, Infectious prevention & control, Helminthiasis prevention & control, Helminthiasis transmission
- Abstract
Hybrid trials that include both clinical and implementation science outcomes are increasingly relevant for public health researchers that aim to rapidly translate study findings into evidence-based practice. The DeWorm3 Project is a series of hybrid trials testing the feasibility of interrupting the transmission of soil transmitted helminths (STH), while conducting implementation science research that contextualizes clinical research findings and provides guidance on opportunities to optimize delivery of STH interventions. The purpose of DeWorm3 implementation science studies is to ensure rapid and efficient translation of evidence into practice. DeWorm3 will use stakeholder mapping to identify individuals who influence or are influenced by school-based or community-wide mass drug administration (MDA) for STH and to evaluate network dynamics that may affect study outcomes and future policy development. Individual interviews and focus groups will generate the qualitative data needed to identify factors that shape, contextualize, and explain DeWorm3 trial outputs and outcomes. Structural readiness surveys will be used to evaluate the factors that drive health system readiness to implement novel interventions, such as community-wide MDA for STH, in order to target change management activities and identify opportunities for sustaining or scaling the intervention. Process mapping will be used to understand what aspects of the intervention are adaptable across heterogeneous implementation settings and to identify contextually-relevant modifiable bottlenecks that may be addressed to improve the intervention delivery process and to achieve intervention outputs. Lastly, intervention costs and incremental cost-effectiveness will be evaluated to compare the efficiency of community-wide MDA to standard-of-care targeted MDA both over the duration of the trial and over a longer elimination time horizon.
- Published
- 2018
- Full Text
- View/download PDF
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