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Susceptibility to carbamate and organophosphate, and ace 1 allele in anopheles gambiae s.l from pyrethroid resistance areas in the city of lomé, togo, west africa

Authors:Koffi M. Ahadji-Dabla, Adjovi D. Amoudji, Dominic B. Dery, Yawo G. Apétogbo, Guillaume K. Ketoh, Isabelle A. Glitho
Int J Biol Med Res. 2017; 8(1): 5843-5847  |  PDF File


Pyrethroïds Resistance in Anopheles population is a major concern in West Africa. To detect the level of carbamate and organophosphate resistance among Anopheles population, susceptibility tests were performed on adult females of Anopheles gambiae s.l from two sites in the city of Lomé (Akodesséwa and Gbadago). The insecticides used were 4% DDT, 0.05% deltamethrin, 1% permethrin, 0.1% bendiocarb, 0.4% chlorpiryfos-methyl and 1% fenitrothion. The tests were done following the WHO standard protocol. An. gambiae s.l was resistant to DDT and pyrethroïds but fully susceptible to chlorpiryfos-methyl and fenitrothion (organophosphates) and suspected resistant to bendiocarb (carbamate) in both sites. The ace-1R frequency was low in both An. coluzzii and An. gambiae from Akodesséwa but was absent in both species from Gbadago. This finding should be the basic information to guide the choice of insecticide that will be used in Indoor Residual Spray program implementation in Togo.