Abstract

This study investigated the prevalence of Aedes aegypti and Ae. albopictus larvae in three topographical areas (i.e. mangrove, rice paddy and mountainous areas). Samples were collected from 300 households in nine districts. Ae. aegypti and Ae. albopictus were found in 17 out of 26 types of water containers in mangrove, rice paddy and mountainous areas. Ae. aegypti and Ae. albopictus laid eggs in different container types depending on topographical areas. Ae. aegypti larvae were found most in preserved areca jars in mangrove and mountainous areas and in banana trees in rice paddy areas. Ae. albopictus larvae were found most in preserved areca jars in mangrove areas, in plant axils in rice paddy areas and in metal boxes in mountainous areas. Ae. albopictus larval indices were higher than Ae. aegypti larval indices in all three topographical areas. House index (HI) and Breteau index (BI) were not different in the three topographical areas but different between mosquito species. HI for both Ae. aegypti and Ae. albopictus in all three topographical areas were greater than 10%, which indicated high risk of DHF transmission in these areas.