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Quantifying and characterizing hourly human exposure to malaria vectors bites to address residual malaria transmission during dry and rainy seasons in rural Southwest Burkina Faso

BACKGROUND: To sustain the efficacy of malaria vector control, the World Health Organization (WHO) recommends the combination of effective tools. Before designing and implementing additional strategies in any setting, it is critical to monitor or predict when and where transmission occurs. However,...

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Autores principales: Soma, D. D., Zogo, B., Taconet, P., Somé, A., Coulibaly, S., Baba-Moussa, L., Ouédraogo, G. A., Koffi, A., Pennetier, C., Dabiré, K. R., Moiroux, N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7847557/
https://www.ncbi.nlm.nih.gov/pubmed/33516197
http://dx.doi.org/10.1186/s12889-021-10304-y
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author Soma, D. D.
Zogo, B.
Taconet, P.
Somé, A.
Coulibaly, S.
Baba-Moussa, L.
Ouédraogo, G. A.
Koffi, A.
Pennetier, C.
Dabiré, K. R.
Moiroux, N.
author_facet Soma, D. D.
Zogo, B.
Taconet, P.
Somé, A.
Coulibaly, S.
Baba-Moussa, L.
Ouédraogo, G. A.
Koffi, A.
Pennetier, C.
Dabiré, K. R.
Moiroux, N.
author_sort Soma, D. D.
collection PubMed
description BACKGROUND: To sustain the efficacy of malaria vector control, the World Health Organization (WHO) recommends the combination of effective tools. Before designing and implementing additional strategies in any setting, it is critical to monitor or predict when and where transmission occurs. However, to date, very few studies have quantified the behavioural interactions between humans and Anopheles vectors in Africa. Here, we characterized residual transmission in a rural area of Burkina Faso where long lasting insecticidal nets (LLIN) are widely used. METHODS: We analysed data on both human and malaria vectors behaviours from 27 villages to measure hourly human exposure to vector bites in dry and rainy seasons using a mathematical model. We estimated the protective efficacy of LLINs and characterised where (indoors vs. outdoors) and when both LLIN users and non-users were exposed to vector bites. RESULTS: The percentage of the population who declared sleeping under a LLIN the previous night was very high regardless of the season, with an average LLIN use ranging from 92.43 to 99.89%. The use of LLIN provided > 80% protection against exposure to vector bites. The proportion of exposure for LLIN users was 29–57% after 05:00 and 0.05–12% before 20:00. More than 80% of exposure occurred indoors for LLIN users and the estimate reached 90% for children under 5 years old in the dry cold season. CONCLUSIONS: LLINs are predicted to provide considerable protection against exposure to malaria vector bites in the rural area of Diébougou. Nevertheless, LLIN users are still exposed to vector bites which occurred mostly indoors in late morning. Therefore, complementary strategies targeting indoor biting vectors in combination with LLIN are expected to be the most efficient to control residual malaria transmission in this area. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12889-021-10304-y.
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spelling pubmed-78475572021-02-01 Quantifying and characterizing hourly human exposure to malaria vectors bites to address residual malaria transmission during dry and rainy seasons in rural Southwest Burkina Faso Soma, D. D. Zogo, B. Taconet, P. Somé, A. Coulibaly, S. Baba-Moussa, L. Ouédraogo, G. A. Koffi, A. Pennetier, C. Dabiré, K. R. Moiroux, N. BMC Public Health Research Article BACKGROUND: To sustain the efficacy of malaria vector control, the World Health Organization (WHO) recommends the combination of effective tools. Before designing and implementing additional strategies in any setting, it is critical to monitor or predict when and where transmission occurs. However, to date, very few studies have quantified the behavioural interactions between humans and Anopheles vectors in Africa. Here, we characterized residual transmission in a rural area of Burkina Faso where long lasting insecticidal nets (LLIN) are widely used. METHODS: We analysed data on both human and malaria vectors behaviours from 27 villages to measure hourly human exposure to vector bites in dry and rainy seasons using a mathematical model. We estimated the protective efficacy of LLINs and characterised where (indoors vs. outdoors) and when both LLIN users and non-users were exposed to vector bites. RESULTS: The percentage of the population who declared sleeping under a LLIN the previous night was very high regardless of the season, with an average LLIN use ranging from 92.43 to 99.89%. The use of LLIN provided > 80% protection against exposure to vector bites. The proportion of exposure for LLIN users was 29–57% after 05:00 and 0.05–12% before 20:00. More than 80% of exposure occurred indoors for LLIN users and the estimate reached 90% for children under 5 years old in the dry cold season. CONCLUSIONS: LLINs are predicted to provide considerable protection against exposure to malaria vector bites in the rural area of Diébougou. Nevertheless, LLIN users are still exposed to vector bites which occurred mostly indoors in late morning. Therefore, complementary strategies targeting indoor biting vectors in combination with LLIN are expected to be the most efficient to control residual malaria transmission in this area. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12889-021-10304-y. BioMed Central 2021-01-30 /pmc/articles/PMC7847557/ /pubmed/33516197 http://dx.doi.org/10.1186/s12889-021-10304-y Text en © The Author(s) 2021 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.
spellingShingle Research Article
Soma, D. D.
Zogo, B.
Taconet, P.
Somé, A.
Coulibaly, S.
Baba-Moussa, L.
Ouédraogo, G. A.
Koffi, A.
Pennetier, C.
Dabiré, K. R.
Moiroux, N.
Quantifying and characterizing hourly human exposure to malaria vectors bites to address residual malaria transmission during dry and rainy seasons in rural Southwest Burkina Faso
title Quantifying and characterizing hourly human exposure to malaria vectors bites to address residual malaria transmission during dry and rainy seasons in rural Southwest Burkina Faso
title_full Quantifying and characterizing hourly human exposure to malaria vectors bites to address residual malaria transmission during dry and rainy seasons in rural Southwest Burkina Faso
title_fullStr Quantifying and characterizing hourly human exposure to malaria vectors bites to address residual malaria transmission during dry and rainy seasons in rural Southwest Burkina Faso
title_full_unstemmed Quantifying and characterizing hourly human exposure to malaria vectors bites to address residual malaria transmission during dry and rainy seasons in rural Southwest Burkina Faso
title_short Quantifying and characterizing hourly human exposure to malaria vectors bites to address residual malaria transmission during dry and rainy seasons in rural Southwest Burkina Faso
title_sort quantifying and characterizing hourly human exposure to malaria vectors bites to address residual malaria transmission during dry and rainy seasons in rural southwest burkina faso
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7847557/
https://www.ncbi.nlm.nih.gov/pubmed/33516197
http://dx.doi.org/10.1186/s12889-021-10304-y
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