Spatial distribution of dengue vector mosquitoes in Malang City, East Java, Indonesia (case study: Jatimulyo Village, Lowokwaru Sub-district)

Abstract

Jatimulyo Sub-district is one of the highest areas of DHF sufferers in Malang City. Dengue Hemorrhagic Fever (DHF) is transmitted through the Ae. aegypti and Ae. albopictus (the mosquito vectors). This study aims to identify diurnal mosquitoes at in-door and out-door place and to analyse the distribution of DHF vector mosquitoes in Jatimulyo Village, Lowokwaru Sub-district, Malang City. This research conducted in November 2019 until May 2020. Sampling of mosquito and larvae was carried out in 1 house/hamlet, there was determined using purposive sampling method and it carried out within active mosquito biting hours (7.00 a.m - 5.00 p.m). Larvae and imago were captured at in-door and out-door places then there were identified using Guidelines book for DHF entomology surveys and the identification book of Aedes (in bahasa). The survey of larvae & mosquito predators on container, and population mobility were carried out by interviewing homeowners. Abiotic factors measured include of temperature, light intensity, humidity, and wind speed. The location coordinates were recorded with GPS. Data analysis using Microsoft Excel 2010, SPSS 16.0 and QGIS 3.12.1. The results showed that there were 2 mosquitoes Ae. albopictus at the first hamlet outdoor sampling point and one Ae. aegypti at the ninth hamlet outdoor. Larvae Ae. albopictus was found in the sampling points of the sixth and eighth hamlet (in-door place), whereas Ae. aegypti was found at the sampling point in the seventh hamlet (in-door place). The distribution of Ae. aegypti and Ae. albopictus mosquitoes can be influenced by mosquito abundance value, Larva Index value, number of predators, number of container, age population of resident, and mobility of resident.