Eficacia de cortinas tratadas con insecticidas de larga duración (Permanet®2.0) en Aedes aegypti

Abstract

The efficacy of long-term insecticide treated curtains (PermaNet® 2.0) was evaluated under laboratory conditions and the effect of sunlight on a small-scale field. A total of 20 PermaNet®2.0 curtains were evaluated through cone tests with Aedes aegypti from the locations “El Hatico” (HTO) and “Loma Linda” (LL) to western Venezuela, as well as the susceptible reference strain New Orleans (NO). Once, the pre-treatment efficacy was determined, the curtains were placed in 5 homes in the parish Cristobal Mendoza, Trujillo; 10 in windows with incidence of sunlight and 10 without incidence of sunlight, for a period of 15 days. Completed the exposure period, were removed and evaluated post-treatment efficacy (15 days) with Ae. aegypti strain NO. Subsequently, the curtains were placed again according to exposure format and were re-evaluated at 30 days (30 days post-treatment efficacy). High efficacy in the laboratory (˂94%) in both the NO strain and the HTO strain was recorded, unlike that shown in the LL strain (37.7%). With regard to the effect of sunlight, it was observed that this factor does not affect the effectiveness of curtains at least in the first 30 days of exposure, which was reflected in the high mortality rate (˂93%) recorded in Ae. aegypti strain NO.