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Objective:To evaluate the bioefficacy ofα-cypermethrin impregnated into long lasting insecticide treated nets(LLITNs- INTERCEPTOR~(?)) against main malaria vector,Anopheles stephensi(An.stephensi).Methods:The effectiveness of bed net impregnated withα-cypermethrin(INTERCEPTOR~(?)) with washing was evaluated.The washing procedure and bioassay tests were carried out according to the WHO-recommended methods.Malaria vector, An.stephensi was exposed to impregnated bed net for three minutes and then mortality measured after 24 h recovery period.Knockdown was also measured according to the logarithmic times. Results:Result of cone bioassay method showed that bioefficacy ofα-cypermethrin decreased from 100%in unwashed to 15%in 20 washes.KT_(50) was measure as one minute in one wash and increased to 40 min in 20 washes.Discussion:Findings of this study provide guideline for malaria vector control authorities and people using pyrethroid-impregnated bed nets.
Objective: To evaluate the bioefficacy of α-cypermethrin impregnated into long lasting insecticide treated nets (LLITNs- INTERCEPTOR®) against main malaria vector, Anopheles stephensi (An. Stephensi). Methods: The effectiveness of bed net impregnated with α-cypermethrin INTERCEPTOR ~ (?)) With washing was evaluated. The washing procedure and bioassay tests were carried out according to the WHO-recommended methods. Malaria vector, An.stephensi was exposed to impregnated bed net for three minutes and then mortality measured after 24 h Results: Result of cone bioassay method showed that bioefficacy of α-cypermethrin decreased from 100% in unwashed to 15% in 20 washes. KT_ (50) was measure as one minute in one wash and increased to 40 min in 20 washes. Discosssion: Findings of this study provide guideline for malaria vector control authorities and people using pyrethroid-impregnated bed nets.