Competence aedes as vectors based on biological characteristics and vulnerability of dengue virus in Semarang city-Indonesia

Background: Semarang city of central Java Province is one of the cities that have a very high incidence of dengue. In an effort to control dengue vector accurate data is needed. This study aimed to describe the profile of dengue vector Aedes sp. based on the density index and index transovarial transmission (ITT) and its relation to the incidence of dengue in the city of Semarang. Method: This research is a cross sectional survey with 18 samples of urban villages in the city of Semarang selected by random technique. To measure the density of Aedes larvae use survey techniques, installation ovitrap, and a survey of adult mosquitoes. Each village surveyed 15 homes and placed ovitrap inside and outside the home. Installation ovitrap attractant using a solution of 10% hay bath. Result: The results show the density of larvae in Semarang is very high based on larval density index HI = 42.4%, CI = 21.3%, BI = OI= 58.9% and 33.9%, so it can be said Semarang including areas with high risk of dengue. Type Ae. albopictus is still found in the city, especially in areas where the use of land for crops is still quite extensive. Ae gonotropik cycle time. aegypti 2.8 days, biological cycles 286.1 hours, and age a lot of mosquitoes belonging to old age. Transovarial index gained by 40.97%, indicating the status of endemicity in Semarang is getting longer. Conclusion: The physical environment, larvae density, density of the adult mosquito influenced the transmission of the dengue fever in Semarang City.