Comparative bio-efficacy evaluation against Aedes aegypti mosquitoes

Abstract

Dengue is a mosquito-borne disease and according to WHO, dengue fever is one of the top ten global threats. The primary vectors that transmit Dengue are Aedes aegypti mosquitoes and, to a lesser extent, Ae. Albopictus. Dengue can be transmitted from person to person even with a single bite from infected mosquito, hence protection of one single mosquito bite is of utmost importance. Mosquito population inside houses is commonly controlled by spraying the mosquito repellents. The allethrins are the synthetic compounds commonly used in mosquito repellents. There are also many plant-based repellents developed, however, the efficacy of the plant based mosquito repellents is still not fully validated. The present study was carried out to assess the comparative bio-efficacy of the test item Aerosol spray containing d-trans allethrin (0.25%) along with control marketed product spray containing essential oils. The test product containing d-trans allethrin (0.25%) exhibited high efficacy against Aedes aegypti mosquitoes when tested in Peet Grady Chamber with exposure period of 60 minutes under laboratory conditions.