Multiple insecticide resistance in Anopheles culicifacies s.l. (Diptera: Culicidae) in east-central India.

Multiple insecticide resistance in Anopheles culicifacies s.l. (Diptera: Culicidae) in east-central India. Pathog Glob Health. 2020 Jan 05;:1-7 Authors: Sahu SS, Thankachy S, Dash S, Swaminathan S, Kasinathan G, Purushothaman J Abstract Development of resistance among the vectors to different insecticides poses a potential threat to vector control programme. Regular monitoring of susceptibility status of vector species to commonly used insecticides is recommended for planning appropriate vector control measures. In this communication, we have determined the phenotypic resistance of Anopheles culicifacies s.l., the major malaria vector against commonly used various insecticides in ten highly malaria endemic districts of Odisha State in east-central India. Bioassays were conducted before and after mass distribution of long-lasting insecticidal nets (LLINs) on field caught female mosquitoes with dichlorodiphenyl-trichloroethane (DDT), malathion and deltamethrin following the standard World Health Organization (WHO) guidelines. From the bioassays using 1x diagnostic concentrations (DC) recommended by WHO, we confirmed a higher frequency of resistant phenotype in An. culicifacies s.l. against DDT (range: 72% to 90%; average: 82%) compared to that against malathion(range: 17% to 34%; average: 26.7%) and deltamethrin (range: 14% to 24%; average: 19.1%) during 2018. Since, resistance to pyrethroid is detected; it is recommended to carry ...
Source: Pathogens and Global Health - Category: International Medicine & Public Health Tags: Pathog Glob Health Source Type: research