Assess the prevalence and insecticide resistance of major dengue vectors <em>Aedes SP.</em> in selected locations of Batticaloa District

Dengue has become the major vector borne disease in Sri Lanka. Control of vectors Ae.aegypti and Ae.albopictus through elimination breeding habitats and application insecticides are considered as most effective ways to suppress dengue epidemic. The mosquito larval survey was undertaken three MOH areas such Oddamavadi, Eravur, Vantharumoolai, during period between January March September October, 2020 Batticaloa district. Five each area were selected randomly for survey. Larval indices House index (HI), container (CI) Breteau (BI) calculated by using standard WHO guidelines order find epidemic risk. Resistance status four commonly used DDT, malathion, deltamethrin carbamate also assessed World Health Organization (WHO) procedures. Findings revealed that study locations abundant with wet containers potential breeding. There a significant difference (p=0.001) abundance indoor all whilst there is no (p=0.697) outdoor locations. results indicated both species can breed urban, suburban, rural areas. But prefers mostly premises where dense vegetation. was dominant have showed Oddamavadi Eravur at high risk Vantharumoolai moderate Results insecticide bioassay susceptible resistance DDT carbamate. It been found possibly malathion. From this result we conclude be effectively space spraying programmes outbreak