Version 1
: Received: 2 May 2023 / Approved: 3 May 2023 / Online: 3 May 2023 (09:30:25 CEST)
How to cite:
TOKPONNON, T. F.; OSSE, R.; Zoulkifilou, S. D.; GBENOUGA, A.; Houessinon, F.; Gounou, I.; Sidick, A.; Messenger, L. A.; Akogbeto, M. Insecticide Resistance in Aedes aegypti Mosquitoes: First Evidence of Kdr F1534C, S989P and V1016G Triple Mutation in Benin, West Africa. Preprints2023, 2023050123. https://doi.org/10.20944/preprints202305.0123.v1
TOKPONNON, T. F.; OSSE, R.; Zoulkifilou, S. D.; GBENOUGA, A.; Houessinon, F.; Gounou, I.; Sidick, A.; Messenger, L. A.; Akogbeto, M. Insecticide Resistance in Aedes aegypti Mosquitoes: First Evidence of Kdr F1534C, S989P and V1016G Triple Mutation in Benin, West Africa. Preprints 2023, 2023050123. https://doi.org/10.20944/preprints202305.0123.v1
TOKPONNON, T. F.; OSSE, R.; Zoulkifilou, S. D.; GBENOUGA, A.; Houessinon, F.; Gounou, I.; Sidick, A.; Messenger, L. A.; Akogbeto, M. Insecticide Resistance in Aedes aegypti Mosquitoes: First Evidence of Kdr F1534C, S989P and V1016G Triple Mutation in Benin, West Africa. Preprints2023, 2023050123. https://doi.org/10.20944/preprints202305.0123.v1
APA Style
TOKPONNON, T. F., OSSE, R., Zoulkifilou, S. D., GBENOUGA, A., Houessinon, F., Gounou, I., Sidick, A., Messenger, L. A., & Akogbeto, M. (2023). Insecticide Resistance in Aedes aegypti Mosquitoes: First Evidence of Kdr F1534C, S989P and V1016G Triple Mutation in Benin, West Africa. Preprints. https://doi.org/10.20944/preprints202305.0123.v1
Chicago/Turabian Style
TOKPONNON, T. F., Louisa A. Messenger and Martin Akogbeto. 2023 "Insecticide Resistance in Aedes aegypti Mosquitoes: First Evidence of Kdr F1534C, S989P and V1016G Triple Mutation in Benin, West Africa" Preprints. https://doi.org/10.20944/preprints202305.0123.v1
Abstract
Epidemics of arboviruses in general, and dengue fever, in particular, are an increasing threat in areas where Aedes (Ae.) aegypti is present. The effectiveness of chemical control of Ae. aegypti is threatened by the increasing frequency of insecticide resistance. The aim of this study was to determine the susceptibility status of Ae. aegypti to public health insecticides and assess the underlying mechanisms driving insecticide resistance. Ae. aegypti eggs were collected in two study sites in the vicinity of houses for two weeks using Gravid Aedes Traps (GATs). After rearing mosquitoes to adulthood, female Ae. aegypti were exposed to the diagnostic doses of permethrin, deltamethrin and bendiocarb, using Centers for Disease Control and Prevention (CDC) bottle bioassays. Unexposed, un-engorged female Ae. aegypti were tested individually for mixed-function oxidase (MFO), glutathione-S-transferase (GST) and esterase activity. Finally, allele-specific PCR (AS-PCR) was used to detect kdr mutations (F1534C, S989P and V1016G) in the voltage-gated sodium channel gene in insecticide-exposed Ae. aegypti. Most traps were oviposition positive; 93.2% and 97% of traps contained Ae. aegypti eggs in the 10ème arrondissement of Cotonou and in Godomey-Togoudo, respectively. Insecticide bioassays assays detected resistance to permethrin and deltamethrin in both study sites and complete susceptibility to bendiocarb. By comparison to the insecticide-susceptibility Rockefeller strain, field Ae. aegypti populations had significantly higher levels of GSTs and significantly lower levels of and esterases; there was no significant difference between levels of MFOs. AS-PCR genotyping revealed the presence of the three kdr mutations (F1534C, S989P and V1016G) at high frequencies; 80.9% (228/282) of Ae. aegypti tested had at least one mutation, while the simultaneous presence of all three kdr mutations was identified in 13 resistant individuals. Study findings demonstrated phenotypic pyrethroid resistance, the overexpression of key detoxification enzymes and the presence of several kdr mutations in Ae. aegypti populations, emphasizing the urgent need to implement vector control strategies, targeting arbovirus vector species in Benin.
Keywords
Aedes aegypti; pyrethroid resistance; kdr mutations; detoxification enzymes; 10ème arrondissement of Cotonou; Godomey-Togoudo; Benin West Africa
Subject
Biology and Life Sciences, Insect Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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