Irritability of malaria vector, Anopheles sacharovi to different insecticides in a malaria-prone area

Objective: To determine the susceptibility and irritability level of malaria vector Anopheles sachamvi (An. sachrovi) to different insecticides in a malaria prone area. Nietbads: Susceptibility and irritability levels of field collected strain of An. sacharovi to WHO standard papers of DDT 4%, dieldrin 0.4%, malathion 5%, fenitrothion 1%, permethlin 0.75%, and deltamethrim 0.05% were determined in East Azerbaijan of Iran during reemerging of malaria as described by WHO. Results: Results showed that at the diagnostic dose of insecticides this species exhibited resistance to DDT, tolerant to dieldrin and but somehow susceptible to fenitrothion, malathion, permethrm and deltamethrm. The results of irritability of this species to DDT, lambdacyhalothrin, permethrin cyfluthtin and deltamethlin revealed that DDT had had the most and dellamethrim the least irritancy effect. The average number of take offs/fly/minutes for DDT was 0.8 0.2. The order of irritability for permethrin, lambdacyhalothrin, cyfluthrin and deltarnethrin were 0.7 0.2, 0.5 0.2, 0.5 0.3, and 0.2 0.1, respectively. Conclusions: Results of this study reveals the responsiveness of the main malaria vector to different insecticides. This phenomenon is depending on several factors such as type and background of insecticide used previously, insecticide properties, perties and physiology of the species. Careful monitoring of insecticide resistance and irritability level of species could provide a clue for appropriate selection of insecticide for malaria control.