Interrupting seasonal transmission of Schistosoma haematobium and control of soil-transmitted helminthiasis in northern and central Côte d’Ivoire: a SCORE study protocol

BACKGROUND: To achieve a world free of schistosomiasis, the objective is to scale up control and elimination efforts in all endemic countries. Where interruption of transmission is considered feasible, countries are encouraged to implement a comprehensive intervention package, including preventive c...

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Autores principales: Tian-Bi, Yves-Nathan T., Ouattara, Mamadou, Knopp, Stefanie, Coulibaly, Jean T., Hürlimann, Eveline, Webster, Bonnie, Allan, Fiona, Rollinson, David, Meïté, Aboulaye, Diakité, Nana R., Konan, Cyrille K., N’Goran, Eliézer K., Utzinger, Jürg
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5789673/
https://www.ncbi.nlm.nih.gov/pubmed/29378542
http://dx.doi.org/10.1186/s12889-018-5044-2
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author Tian-Bi, Yves-Nathan T.
Ouattara, Mamadou
Knopp, Stefanie
Coulibaly, Jean T.
Hürlimann, Eveline
Webster, Bonnie
Allan, Fiona
Rollinson, David
Meïté, Aboulaye
Diakité, Nana R.
Konan, Cyrille K.
N’Goran, Eliézer K.
Utzinger, Jürg
author_facet Tian-Bi, Yves-Nathan T.
Ouattara, Mamadou
Knopp, Stefanie
Coulibaly, Jean T.
Hürlimann, Eveline
Webster, Bonnie
Allan, Fiona
Rollinson, David
Meïté, Aboulaye
Diakité, Nana R.
Konan, Cyrille K.
N’Goran, Eliézer K.
Utzinger, Jürg
author_sort Tian-Bi, Yves-Nathan T.
collection PubMed
description BACKGROUND: To achieve a world free of schistosomiasis, the objective is to scale up control and elimination efforts in all endemic countries. Where interruption of transmission is considered feasible, countries are encouraged to implement a comprehensive intervention package, including preventive chemotherapy, information, education and communication (IEC), water, sanitation and hygiene (WASH), and snail control. In northern and central Côte d’Ivoire, transmission of Schistosoma haematobium is seasonal and elimination might be achieved. In a cluster-randomised trial, we will assess different treatment schemes to interrupt S. haematobium transmission and control soil-transmitted helminthiasis over a 3-year period. We will compare the impact of (i) arm A: annual mass drug administration (MDA) with praziquantel and albendazole before the peak schistosomiasis transmission season; (ii) arm B: annual MDA after the peak schistosomiasis transmission season; (iii) arm C: two yearly treatments before and after peak schistosomiasis transmission; and (iv) arm D: annual MDA before peak schistosomiasis transmission, coupled with chemical snail control using niclosamide. METHODS/DESIGN: The prevalence and intensity of S. haematobium and soil-transmitted helminth infections will be assessed using urine filtration and Kato-Katz thick smears, respectively, in six administrative regions in northern and central parts of Côte d’Ivoire. Once a year, urine and stool samples will be collected and examined from 50 children aged 5–8 years, 100 children aged 9–12 years and 50 adults aged 20–55 years in each of 60 selected villages. Changes in S. haematobium and soil-transmitted helminth prevalence and intensity will be assessed between years and stratified by intervention arm. In the 15 villages randomly assigned to intervention arm D, intermediate host snails will be collected three times per year, before niclosamide is applied to the selected freshwater bodies. The snail abundance and infection rates over time will allow drawing inference on the force of transmission. DISCUSSION: This cluster-randomised intervention trial will elucidate whether in an area with seasonal transmission, the four different treatment schemes can interrupt S. haematobium transmission and control soil-transmitted helminthiasis. Lessons learned will help to guide schistosomiasis control and elimination programmes elsewhere in Africa. TRIAL REGISTRATION: ISRCTN ISRCTN10926858. Registered 21 December 2016. Retrospectively registered.
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spelling pubmed-57896732018-02-08 Interrupting seasonal transmission of Schistosoma haematobium and control of soil-transmitted helminthiasis in northern and central Côte d’Ivoire: a SCORE study protocol Tian-Bi, Yves-Nathan T. Ouattara, Mamadou Knopp, Stefanie Coulibaly, Jean T. Hürlimann, Eveline Webster, Bonnie Allan, Fiona Rollinson, David Meïté, Aboulaye Diakité, Nana R. Konan, Cyrille K. N’Goran, Eliézer K. Utzinger, Jürg BMC Public Health Study Protocol BACKGROUND: To achieve a world free of schistosomiasis, the objective is to scale up control and elimination efforts in all endemic countries. Where interruption of transmission is considered feasible, countries are encouraged to implement a comprehensive intervention package, including preventive chemotherapy, information, education and communication (IEC), water, sanitation and hygiene (WASH), and snail control. In northern and central Côte d’Ivoire, transmission of Schistosoma haematobium is seasonal and elimination might be achieved. In a cluster-randomised trial, we will assess different treatment schemes to interrupt S. haematobium transmission and control soil-transmitted helminthiasis over a 3-year period. We will compare the impact of (i) arm A: annual mass drug administration (MDA) with praziquantel and albendazole before the peak schistosomiasis transmission season; (ii) arm B: annual MDA after the peak schistosomiasis transmission season; (iii) arm C: two yearly treatments before and after peak schistosomiasis transmission; and (iv) arm D: annual MDA before peak schistosomiasis transmission, coupled with chemical snail control using niclosamide. METHODS/DESIGN: The prevalence and intensity of S. haematobium and soil-transmitted helminth infections will be assessed using urine filtration and Kato-Katz thick smears, respectively, in six administrative regions in northern and central parts of Côte d’Ivoire. Once a year, urine and stool samples will be collected and examined from 50 children aged 5–8 years, 100 children aged 9–12 years and 50 adults aged 20–55 years in each of 60 selected villages. Changes in S. haematobium and soil-transmitted helminth prevalence and intensity will be assessed between years and stratified by intervention arm. In the 15 villages randomly assigned to intervention arm D, intermediate host snails will be collected three times per year, before niclosamide is applied to the selected freshwater bodies. The snail abundance and infection rates over time will allow drawing inference on the force of transmission. DISCUSSION: This cluster-randomised intervention trial will elucidate whether in an area with seasonal transmission, the four different treatment schemes can interrupt S. haematobium transmission and control soil-transmitted helminthiasis. Lessons learned will help to guide schistosomiasis control and elimination programmes elsewhere in Africa. TRIAL REGISTRATION: ISRCTN ISRCTN10926858. Registered 21 December 2016. Retrospectively registered. BioMed Central 2018-01-29 /pmc/articles/PMC5789673/ /pubmed/29378542 http://dx.doi.org/10.1186/s12889-018-5044-2 Text en © The Author(s). 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Study Protocol
Tian-Bi, Yves-Nathan T.
Ouattara, Mamadou
Knopp, Stefanie
Coulibaly, Jean T.
Hürlimann, Eveline
Webster, Bonnie
Allan, Fiona
Rollinson, David
Meïté, Aboulaye
Diakité, Nana R.
Konan, Cyrille K.
N’Goran, Eliézer K.
Utzinger, Jürg
Interrupting seasonal transmission of Schistosoma haematobium and control of soil-transmitted helminthiasis in northern and central Côte d’Ivoire: a SCORE study protocol
title Interrupting seasonal transmission of Schistosoma haematobium and control of soil-transmitted helminthiasis in northern and central Côte d’Ivoire: a SCORE study protocol
title_full Interrupting seasonal transmission of Schistosoma haematobium and control of soil-transmitted helminthiasis in northern and central Côte d’Ivoire: a SCORE study protocol
title_fullStr Interrupting seasonal transmission of Schistosoma haematobium and control of soil-transmitted helminthiasis in northern and central Côte d’Ivoire: a SCORE study protocol
title_full_unstemmed Interrupting seasonal transmission of Schistosoma haematobium and control of soil-transmitted helminthiasis in northern and central Côte d’Ivoire: a SCORE study protocol
title_short Interrupting seasonal transmission of Schistosoma haematobium and control of soil-transmitted helminthiasis in northern and central Côte d’Ivoire: a SCORE study protocol
title_sort interrupting seasonal transmission of schistosoma haematobium and control of soil-transmitted helminthiasis in northern and central côte d’ivoire: a score study protocol
topic Study Protocol
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5789673/
https://www.ncbi.nlm.nih.gov/pubmed/29378542
http://dx.doi.org/10.1186/s12889-018-5044-2
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