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KMID : 1120220100010010043
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Osong Public Health and Research Perspectives
2010 Volume.1 No. 1 p.43 ~ p.49
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Prevalence of Clonorchis sinensis Infections Along the Five Major Rivers in Republic of Korea, 2007
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Kim Hyun-Kyung
Cheun Hyeng-Il
Cheun Byung-Suk
Lee Ki-Yeon
Kim Tong-Soo
Lee Sang-Eun
Lee Won-Ja
Cho Shin-Hyeong
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Abstract
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Objectives: The prevalence of Clonorchis sinensis infection was investigated among residents of the five major river basins, that is, Hangang, Nakdonggang, Seomjingang, Yeongsangang, and Geumgang River basins in Korea.
Methods: From January to December 2007, a total of 31,268 stool samples were collected from 29 localities and examined by the formalin-ether sedimentation technique.
Results: Intestinal parasite eggs and/or protozoan cysts were detected from 2957 (9.5%) inhabitants. Number of residents harbouring helminth eggs in the faeces was 2542 (8.1%) for C. sinensis, 255 (0.8%) for Heterophyes spp., 36 (0.1%) for Echinostoma spp., 30 (0.1%) for Trichuris trichiura, 8 (0.03%) for Ascaris lumbricoides, 7 (0.02%) for Gymnophalloide seoi, and 50 (0.02%) for Trichostrongylus orientalis. Number of residents harbouring protozoan cysts in the faeces was 133 (1.3%) for Entamoeba spp. and 50 (0.2%) for Giardia lamblia. The positive rates of C. sinensis in Nakdonggang, Seomjingang, Yeongsangang, Geumgang, and Hangang River basins were 12.2%, 9.5%, 3.3%, 3.0%, and 1.0%, respectively. The egg positive rate of C. sinensis was higher in male (10.6%) than in female (6.1%), and the age group of 50s had the highest positive rate (10.4%).
Conclusion: The result of this study revealed little decrease in positive rate of C. sinensis compared with the result of southern endemic areas of Korea in 2006.
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KEYWORD
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Clonorchis sinensis, five major rivers, intestinal parasites, prevalence
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