(A) Geographical representation of collection sites in Cameroon. The study sites are represented by stars. The color represents the targeted species. (B) Susceptibility profile using WHO bioassay tube test according to the study sites. Mortality rates were recorded 24 h post-exposure to the discriminating concentration of insecticides. Data are shown as mean ± standard error. Mosquitoes were sampled both pirimiphos-methyl and malathion tests on the same day at Gounougou (December 2021) and Mibellon (October 2021)

PUBLICATION: Susceptibility profile of Anopheles and target site resistance mechanism against organophosphates in Cameroon, by Dr Judith Dandi & al.

Mosquitoes are becoming increasingly resistant to insecticides. As older insecticides such as pyrethroids become less effective, a different class of insecticides—organophosphates like pirimiphos-methyl (PM)—has been proposed as a possible alternative. This study investigated how mosquitoes in six regions of Cameroon respond to two organophosphates: PM and malathion. It focused on three major mosquito species: Anopheles…