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Studies on the current epidemiological situation of brugian filariasis in endemic areas of Korea
Yung Han Paik,You Jung Cho,Do Seo Koo,Han Il Ree and Jae Chul Shim
Department of Parasitology, Department of Preventive Medicine, College of Medicine, Kyung-Hee University, Seoul 130-701, Korea.
Department of Parasitology, College of Medicine, Yonsei University, Seoul 120-752, Korea.
Department of Medical Entomology, National Institute of Health, Seoul 122-040, Korea.
Abstract
An epidemiological study on brugian filariasis was carried out in endemic areas including Cheju Island in Korea, with a brief review of literatures.The results showed that the incidence among residents has remarkably decreased in Cheju Island, which was the main endemic area. Reviewing available informations on the prevalence of filariasis reported in recent years and also judging from the present socio-economic conditions which enable people to practice personal protection against mosquitos, it can be said with confidence that filariasis has almost disappeared from Cheju Island and inland areas. The disease is considered to remain at a low level of endemicity in Hugsan Islands. Certainly mass diethylcarbamazine (DEC) treatment carried out in Cheju Island in the 1960s and 1970s and remarkable economic growth followed by improved living standard and altered life-style of inhabitants could all have combined effects on the disappearance of this mosquito-borne diseae in this island. If the present trends go on, the possibility of resurgence of filariasis in Cheju Island is hardly postulated.
Figures
Fig. 1 Map of South-Western sector of Korean peninsula and Cheju Island, showing the study villages(*).
Tables
Table 1 The number of blood smears taken by age-group and sex in Docho Island
Table 2 The number of blood smears taken by age-group and sex in Cheju Island
Table 3 The number of blood smears taken by village in Cheju Island
Table 4 Human biting collections indoors and outdoors at Taehung-Ri, Cheju Island in early September 1988 (average of two night collectinos)
Table 5 Daytime indoor resting place collections of mosquitos at Taehung-Ri on 2 September, 1988
Table 6 The results of a survey on life style of inhabitants in Taehung-Ri, Cheju Island
Table 7 Summarized records of microfilaria rates obtained from the selected three villages
Table 8 Comparison of Ae. togoi collection in two villages
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