Prevalence of Aedes mosquito in high risk areas in Bangkok Metropolis in 2005

Abstract

Dengue haemorrhagic fever (DHF) is one of the main public health problems in Thailand. According to the disease statistics, outbreak in Bangkok in 2005-2006 had been predicted. To prevent the outbreak, Bangkok Metropolitan Administration (BMA) then set up a policy to decrease House Index (HI) and morbidity of DHF. The objectives of this study were to study vector breeding places, density of Aedes larvae, vector species and evaluate the DHF vectors control project in 2005. The study was done during September-December 2005. Larval survey and identification were conducted in 189 communities (5,427 houses), 33 temples and 21 schools around the DHF patient's houses in Bangkok. Results revealed that community container Index (CI) was 13.69%. The highest positive containers were jar (essential use water container), miscellaneous, container under plant pot and cement container respectively. The average containers per house was 2.3. House Index of 1-10, 11-20, 21-30 and 91-100 were 21.16%, 20.11%, 18.52% and 1.89%, respectively. The HI of 0 was 7.41%. The successful rate (HI>10) was 28.57%. The temples CI was 12.86% and the schools Cl was 9.09%. The majority species of the DHF vectors was Aedes aegypti.