Pyrethroid Resistance in Anopheles

The development of photo-stable synthetic pyrethroids has led to several of these products e. g. deltamethrin, permethrin,lambdacyhalothrin and alphacypermithrin etc, replacing DDT for house-spraying in some malaria control programmes during the 1990s. More importantly, pyrethroids are currently the onlypractical insecticides for impregnating bednets, and a widely promoted vector control intervention, because they are safe tohuman, highly toxicity for mosquitoes, coupled with a long-lasting residual activity in textile, and less are expensive than spraying walls for residual insecticide. They are effective in reducing child deaths, and can be better administered through a horizontal,community-based program.