CURRENT INSECTICIDE RESISTANCE STATUS IN Culex quinquefasciatus SAY MOSQUITO POPULATIONS FROM MONO DEPARTMENT IN SOUTH-WESTERN REPUBLIC OF BENIN, WEST AFRICA

Lègba Nazaire Aïzoun; Mindégnisèa Habib Tamègnon; Seindé Espérance Mèdoatinsa; Chèpo Daniel Chougourou

doi:10.22270/ujpr.v11i1.1485

Lègba Nazaire Aïzoun Laboratory of Pluridisciplinary Researches of Technical Teaching (LaRPET), Normal High School of Technical Teaching (ENSET) of Lokossa, National University of Sciences, Technologies, Engineering and Mathematics (UNSTIM) of Abomey, Cotonou, Benin.
Mindégnisèa Habib Tamègnon Laboratory of Pluridisciplinary Researches of Technical Teaching (LaRPET), Normal High School of Technical Teaching (ENSET) of Lokossa, National University of Sciences, Technologies, Engineering and Mathematics (UNSTIM) of Abomey, Cotonou, Benin.
Seindé Espérance Mèdoatinsa Unit of Experimental and Clinical Biology, Laboratory of Medical and Pharmaceutical Biotechnology Research, National High School of Applied Biosciences and Biotechnology (ENSBBA) of Dassa-Zoumè, National University of Sciences, Technologies, Engineering and Mathematics (UNSTIM) of Abomey, Benin.
Chèpo Daniel Chougourou Department of Environment Genius, Polytechnic School of Abomey-Calavi (EPAC), University of Abomey-Calavi (UAC), Cotonou, Benin.

10.22270/ujpr.v11i1.1485

Keywords:

Benin, Culex quinquefasciatus, insecticide resistance, lymphatic filariasis

Abstract

Background and aims: Culex quinquefasciatus, an important vector in the transmission of human diseases has developed resistance to commonly used classes of insecticides in populations worldwide in public health. The current study was aimed to investigate on the current insecticide resistance status in Culex quinquefasciatus Say mosquito populations from Mono department in South-western Republic of Benin, West Africa.

Methods: Larvae and pupae of Culex quinquefasciatus populations were collected from the breeding sites in Mono department in 2023 during the great rainy season. WHO susceptibility tests were conducted on unfed female mosquitoes aged 2-5 days old. WHO bioassays were performed with impregnated papers of dichlorodiphenyltrichloroethane (DDT) (4%), permethrin (0.75%), deltamethrin (0.05%), fenitrothion (1%) and bendiocarb (0.1%).

Results: The results showed Culex quinquefasciatus mosquito populations were resistant to DDT, permethrin, deltamethrin insecticides. There is possible resistance to fenitrothion and bendiocarb. For that, further studies are needed to detect the real resistance status to these products. There is cross-resistance to both pyrethroid and organochlorine insecticides.

Conclusion: The physical barrier of Long Lasting Insecticidal Nets (LLINs) which are regularly distributed free by Beninese National Malaria Control Program throughout the entire country to increase coverage of LLINs is still important despite the insecticide resistance observed.