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24 June 2021 Resting Behavior of Blood-Fed Females and Host Feeding Preferences of Aedes aegypti (Diptera: Culicidae) Morphological Forms in Senegal
Babacar Diouf, Ndeye Marie Sene, El Hadj Ndiaye, Alioune Gaye, El Hadj Malick Ngom, Assiyatou Gueye, Fatoumata Seck, Cheikh Tidiane Diagne, Ibrahima Dia, Mawlouth Diallo, Diawo Diallo
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Abstract

Aedes aegypti (Linnaeus) is the main vector of most arboviruses in tropical and subtropical urban areas. In West Africa, particularly in Senegal, domestic and wild populations have been described. Both Ae. aegypti aegypti (Aaa) and Ae. aegypti formosus (Aaf) were found in progenies of Ae. aegypti families from several localities of Senegal. However, nothing is known about their resting and trophic behavior, which are key data for vector control. To fill this gap, blood-fed mosquitoes were collected monthly indoors and outdoors with BackPack aspirators and BG-Sentinel 2 traps between July and November 2019 from four urban sites. The enzyme-linked immunosorbent assay technique was used to analyze blood-fed Aaa and Aaf specimens. Both forms were found resting in all investigated places with the highest proportions found in scrap metals (51.7% for Aaa and 44.1% for Aaf) and used tires (19.2% for Aaa and 26.1% for Aaf). Blood-fed Aaf females showed lower occupation of the indoors environment compared to Aaa. Overall, the percentages of single bloodmeals from human were 80.5% (916/1138) for Aaa and 71.1% (263/370) for Aaf. A low frequency of other domestic hosts, including bovine, ovine, and cat were detected for both forms. This study provides the first data on resting and trophic behavior of Aaa and Aaf in Senegal. Both forms showed differences in their resting behavior but fed primarily on human and highlight the risk of arboviruses transmission in urban areas.

© The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
Babacar Diouf, Ndeye Marie Sene, El Hadj Ndiaye, Alioune Gaye, El Hadj Malick Ngom, Assiyatou Gueye, Fatoumata Seck, Cheikh Tidiane Diagne, Ibrahima Dia, Mawlouth Diallo, and Diawo Diallo "Resting Behavior of Blood-Fed Females and Host Feeding Preferences of Aedes aegypti (Diptera: Culicidae) Morphological Forms in Senegal," Journal of Medical Entomology 58(6), 2467-2473, (24 June 2021). https://doi.org/10.1093/jme/tjab111
Received: 25 March 2021; Accepted: 26 May 2021; Published: 24 June 2021
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KEYWORDS
Aedes aegypti aegypti
Aedes aegypti formosus
blood feeding
resting place
Senegal
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