Blood-Feeding Patterns and Resting Behavior of Aedes aegypti from Three Health Districts of Ouagadougou City, Burkina Faso

Wendegoudi M. Ouédraogo Laboratoire d’Entomologie Fondamentale et Appliquée, Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso;
Programme National de Lutte contre les Maladies Tropicales Négligées (PNMTN), Ministère de la Santé, Ouagadougou, Burkina Faso;

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Nicolas Zanré Laboratoire d’Entomologie Fondamentale et Appliquée, Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso;

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Aboubacar Sombié Laboratoire d’Entomologie Fondamentale et Appliquée, Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso;

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Felix Yameogo Laboratoire d’Entomologie Fondamentale et Appliquée, Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso;

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Awa Gnémé Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso;

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Antoine Sanon Laboratoire d’Entomologie Fondamentale et Appliquée, Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso;

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Carlo Costantini UMR MIVEGEC, Université Montpellier, CNRS, IRD, Montpellier, France;

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Hirotaka Kanuka Department of Tropical Medicine, The Jikei University School of Medicine, Tokyo, Japan;

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Mafalda Viana School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, United Kingdom;

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David Weetman Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom

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Philip J. McCall Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom

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Athanase Badolo Laboratoire d’Entomologie Fondamentale et Appliquée, Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso;

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ABSTRACT.

Recent dengue outbreaks have occurred in Ouagadougou and Bobo-Dioulasso, the two major cities of Burkina Faso. Dengue is a viral disease transmitted primarily by Aedes aegypti, a highly anthropophilic mosquito that thrives in human-transformed environments and breeds predominantly in artificial containers. In 2018, we investigated the resting and blood-feeding habits of Ae. aegypti in urban settings of Ouagadougou. In a 3-month cross-sectional study starting in August 2018, indoors and outdoors resting adult mosquitoes were collected using Prokopack aspirators in three health districts (HD). All mosquitoes were morphologically identified, and DNA was extracted from blood-fed Ae. aegypti females. A multiplex polymerase chain reaction with specific primers was used to identify the origin of the blood meal. A total of 4,256 adult Ae. aegypti mosquitoes, including 1,908 females, were collected. A preference for exophily was recorded in Bogodogo and Nongremassom, although an unexpectedly higher proportion of blood-fed females were found indoors than outdoors. Respectively, 96.09%, 91.03%, and 95.54% of the blood meals successfully analyzed in Baskuy, Bogodogo, and Nongremassom were from a single human host, with the remainder from domestic mammals as single or multiple hosts. Modeling total Ae. aegypti and blood-fed female counts showed that among other predictors, human density, outdoor environment, and house type affect their total densities. Our study revealed an exophilic tendency as well as a pronounced anthropophilic preference of Ae. aegypti adults, critical findings to consider when planning accurate entomological surveillance and effective interventions against Ae. aegypti in urban settings.

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Author Notes

Disclosures: The Ethical Research Committee of the Ministry of Health approved this study (no. 2017-8-0126 du 02/08/2017). Signed informed consent was obtained from all householders included in the study before start of the field collection.

Current contact information: Wendegoudi M. Ouédraogo, Laboratoire d’Entomologie Fondamentale et Appliquée, Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso, and Programme National de Lutte contre les Maladies Tropicales Négligées (PNMTN), Ministère de la Santé, Ouagadougou, Burkina Faso, E-mail: math40x@gmail.com. Nicolas Zanré, Aboubacar Sombié, Felix Yameogo, Antoine Sanon, and Athanase Badolo, Laboratoire d’Entomologie Fondamentale et Appliquée, Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso, E-mails: nicozanre12@gmail.com, aboubacarsombie@yahoo.fr, yamflex88@gmail.com, sanonant@gmail.com, and a.badolo@gmail.com. Awa Gnémé, Université Joseph Ki-Zerbo, Ouagadougou, Burkina Faso, E-mail: gplouise@yahoo.fr. Carlo Costantini, Institut de Recherche pour le Développement, Montpellier, France, E-mail: carlo.costantini@ird.fr. Hirotaka Kanuka, Department of Tropical Medicine, The Jikei University School of Medicine, Tokyo, Japan, E-mail: kanuka@jikei.ac.jp. Mafalda Viana, School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, United Kingdom, E-mail: mafalda.viana@glasgow.ac.uk. David Weetman and Philip J. McCall, Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom, E-mails: david.weetman@lstmed.ac.uk and philip.mccall@lstmed.ac.uk.

Address correspondence to Athanase Badolo, 03 BP 7021, Ouagadougou 03, Burkina Faso. E-mail: a.badolo@gmail.com
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