Status of Resistance of Aedes sp. Mosquitoes to Malathion 0.8% at Poltekkes Banjarmasin, Banjarbaru

Dengue Hemorrhagic Fever (DHF) is a serious public health problem. Control of DHF is commonly carried out through the use of insecticides, particularly malathion. However, long-term and continuous use of insecticides may lead to the development of resistance in mosquito populations. This study aimed to assess the resistance status of Aedes sp. mosquitoes to malathion 0.8% at Poltekkes Banjarmasin in Banjarbaru. This research employed a descriptive observational design with a cross-sectional survey approach. Sampling of Aedes sp. mosquitoes was conducted within the campus area of Poltekkes Kemenkes Banjarmasin. Mosquito resistance was assessed using the WHO standard susceptibility test (WHO susceptibility test). Data analysis consisted of descriptive analysis to determine the level of mosquito resistance. The resistance test results showed that 100% of Aedes sp. mosquitoes in the test tubes experienced knockdown, with an LT₅₀ of 18.3 minutes, an LT₉₀ of 39.3 minutes, an LT₉₅ of 47 minutes, and an LT₉₉ of 56.8 minutes. Therefore, the resistance status of Aedes sp. mosquitoes at the Poltekkes Banjarmasin campus was classified as susceptible to malathion 0.8%. These findings contribute to locally specific insecticide resistance data, which can support dengue vector control strategies through the rational and sustainable use of insecticides.