Shift in species composition in the Anopheles gambiae complex after implementation of long‐lasting insecticidal nets in Dielmo,Senegal |
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| Authors: | S. SOUGOUFARA M. HARRY S. DOUCOURÉ P. M. SEMBÈNE C. SOKHNA |
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| Affiliation: | 1. Unité de Recherche sur les Maladies Infectieuses Tropicales Emergentes (URMITE), Unité Mixte de Recherche (UMR), Centre National de la Recherche Scientifique (CNRS) 6236, Institut de Recherche pour le Développement (IRD) 198, Aix Marseille Université, Campus Universitaire IRD de Hann, Dakar, Senegal;2. Département de Biologie Animale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Dakar Fann, Senegal;3. Unité de Formation et de Recherche (UFR) Sciences, Université Paris‐Sud, Orsay, France;4. UMR évolution, Génomes, Comportement, écologie (EGCE), CNRS‐IRD Université Paris Sud, Institut Diversité, écologie et évolution du Vivant (IDEEV), Université Paris‐Saclay, Gif‐sur‐Yvette, France |
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| Abstract: | Long‐lasting insecticidal nets (LLINs) and indoor residual spraying (IRS) are the cornerstones of malaria vector control. However, the effectiveness of these control tools depends on vector ecology and behaviour, which also largely determine the efficacy of certain Anopheles mosquitoes (Diptera: Culicidae) as vectors. Malaria vectors in sub‐Saharan Africa are primarily species of the Anopheles gambiae complex, which present intraspecific differences in behaviour that affect how they respond to vector control tools. The focus of this study is the change in species composition in the An. gambiae complex after the implementation of LLINs in Dielmo, Senegal. The main findings referred to dramatic decreases in the proportions of Anopheles coluzzii and An. gambiae after the introduction of LLINs, and an increase in the proportion of Anopheles arabiensis. Two years after LLINs were first introduced, An. arabiensis remained the most prevalent species and An. gambiae had begun to rebound. This indicated a need to develop additional vector control tools that can target the full range of malaria vectors. |
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| Keywords: | Anopheles insecticide‐treated bednets malaria vector composition |
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