Affiliations: *National Institute of Health, Department of Medical Sciences
Source: Journal of Health Science 1999; 18(7)
Language: Thai with English abstract
Aedes survey, Visual Larval Survey and Pupal Survey, were conducted to compare variables between 9 High Dengue Haemorrhagic Fever (DHF) case villages and 9 Low DHF case villages in Prathai District Nakhon Ratchasima Province in November 1997 and August 1998. High and Low DHF case villages were classified by using reports of DHF case. From the DHF control plan, the villages were grouped by DHF case in to High risk villages, Medium risk villages and Low risk villages. It was found that High DHF case villages were equal to High and Medium risk villages while Low DHF case villages were equal to Low risk villages. From species identification, 1,746 larvae were random sampled from containers and there were 1,575 Aedes aegypti-larvae (90.21%). The important breeding place of Ae. Aegypti were Jars and Cement tanks which produced 91% of pupae in these villages. The average number of variable such as positive house, positive container, pupae and Breteau Index (BI); in High DHF case villages were 17.72, 36.72, 292.39 and 91.87 respectively and Low DHF case villages were 15.94, 27.78, 350.11 and 70.13 respectively. The conparison showed high value of the variables, however, most of them were not statistically different between High and Low DHF case villages. BI in both village groups were more than 50, in high DHF case villages was 23.66% more than low DHF case villages. In this survey, there were report of DHF cases in both village group, so Aedes survey should be carried out in villages for DHF control plan.