Epidemiological study of clonorchiasis and metagonimiasis along the Geum-gang (River) in Okcheon-gun (County), Korea

摘要

The endemic status of clonorchiasis and metagonimiasis along the Geumgang (River) in Okcheon gun (County) in Korea was examined. From February to December 2000. stools of total 1.081 inhabitants living in 5 villages were examined. Each stool specimen was examined by both the cellophane thick smear method and the formalin-ether sedimentation technique. Egg-positive cases were further analyzed by Stoll's egg-counting technique, and praxiquantel was administered to positive cases. The egg-positive rates for Clonorchis sinensis and Metagonimus species were 9.3 percent and 5.5 percent. respectively, and the double infection rale was 3.5 percent. The numbers of eggs per gram (EPG) of feres of C. sineiisis and Metagonimus sp. were 918 +- 1.463 and 711 +-947. respectively. The egg-positive rates for C. siensis and Metagonimus sp. in the riverside area were 14.2 percent and 8.4 percent. respectively, which were significantly higher than those of the inland area (3.2 percent and 1.7 percent. respectively). The egg-positive rates of C. sinensis and Metagonimus sp. in males (16.7 percent and 10.0 percent) were significantly higher than those of females (3.5 percent and 1.8 percent). However, there were no significant differences of EPG values between localities and sexes. The prevalence of clonorchiasis and metagonimiasis in this survey was significantly lower than that in the previous reports. However, there is still a high prevalence of infection with C. sinensis and Metagonimus sp. in this region, especially in the riverside area.