ECOLOGICAL SURVEY AND CHEMOTHERAPY OF FILARIASIS IN CHE JU DO, KOREA.
Rept. no. 2 (Final) Jul 68-Jul 69,
SEOUL NATIONAL UNIV (REPUBLIC OF KOREA) SCHOOL OF PUBLIC HEALTH
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Seventy seven per cent of the total population from seven study areas in the first survey 1968 and 60.3 from five areas in the second survey 1969 were blood examined for microfilaria. The examination was done between 9 p.m. and 3 a.m. which proved to be the best time determined by microfilaria periodicity study. The human microfilaria rate varied by village which seems to be closely related to the duration of endemicity of the disease, the density of the parasite population among definitive host, and in less extent, to the density of vector population. Various animals available in the study areas have been surveyed for filariasis no human filaria species has been found but dog filaria from a couple of dogs has been found among animals examined, eighteen species of mosquitoes were identified from the island. Aedes togoi was the only species found naturally infected by filaria species larvae among several species examined. Two hundred eighty-one patients in four villages were treated with placebo and two hundred ninety-one patients in three villages with Hetrazan a follow up survey done one year after the chemotherapy showed an excellent efficacy of the Hetrazan. Author