Efecto de toldillos tratados industrial o manualmente con insecticidas de larga duración, en el control vectorial de la leishmaniasis cutánea en la Región Subandina de Colombia

The effects of long lasting insecticide treated bednet (LLNs) on Lutzomyia longiflocosa, a presumed main vector of cutaneous leishmaniasis (CL) in Colombia were evaluated. Controlled experiments were earned out using tunnel. WHO cones, and the Skovmand device, modified for sandflies. In this bioassays, four washed (standard and traditional) and unwashed LLNs. treated in factory (alphacypermethrin and deltamethrin, two doses) or by the do it yourself method (lambdacyhalothrin) were evaluated. Deltametluin and lambdacyhalothrin LLNs were evaluated in experimental huts. These LLNs were evaluated in an intervention trial in 21 rural settlements on the sub-Andean region of Huila department dining two years, hi the controlled experiments, the four LLNs caused high mortality (>80%) up to 20 standard washes. The traditional washed caused high mortality, but up to 10 washes. The LLNs produced the following effects on L. Jovgiflocosa'. knock down, initancy. inhibition of passing through the net and feeding inhibition. Lambdacyhalothrin and deltametluin LLNs produced the best results. The experimental huts caused high mortality, passing through the net and landing inhibition and induced exophily. The protective effect of both LLNs was high (70-90%). For the intervention trial, both LLNs caused a significantly reduction (70% approximately) in the indoors abundance of L. Jovgiflocosa up to two years post-intervention. The percentage of fully-fed females was also reduced. The high efficacy and effectiveness of LLNs against L. Jovgiflocosa was demonstrated in different scales. Therefore, the use of LLNs may have strong impact in the control of CL along the sub-Andean region.