Insecticide susceptibility
In total, 8921 mosquitoes from the study area were exposed to deltamethrin (12.5 µg/bottle and 120 µg/bottle), broflanilide (6 µg/bottle) and clothianidin (90 µg/bottle) in susceptibility bottle bioassays performed at baseline and at 3- and 10-months post IRS intervention. Mortality with deltamethrin was < 40% after exposure to the diagnostic dose of 12.5 µg/bottle and did not exceed 60% at the 10 × dose of 125 µg/bottle, indicating a high intensity of pyrethroid resistance in the study area (Fig. Mortality of wild 