Prevalence of clonorchiasis in southern endemic areas of Korea in 2006
2008
Cho, S.H. (Korea Center for Disease Control and Prevention, Seoul, Republic of Korea) | Lee, K.Y. (Korea Center for Disease Control and Prevention, Seoul, Republic of Korea) | Lee, B.C. (Korea Center for Disease Control and Prevention, Seoul, Republic of Korea) | Cho, P.Y. (Korea Center for Disease Control and Prevention, Seoul, Republic of Korea) | Cheun, H.I. (Korea Center for Disease Control and Prevention, Seoul, Republic of Korea) | Hong, S.T. (Seoul National University Medical Research Center, Seoul, Republic of Korea) | Sohn, W.M. (Gyeongsang National University College of Medicine, Jinju, Republic of Korea) | Kim, T.S. (Korea Center for Disease Control and Prevention, Seoul, Republic of Korea), E-mail: [email protected]
This study was performed to investigate prevalence of clonorchiasis among the inhabitants living in villages along the 4 major rivers, Nakdong-gang (= river), Seomjin-gang, Youngsan-gang, and Guem-gang in southern Korea. From January to December 2006, a total of 24,075 stool samples (1 sample per an inhabitant) were collected in 23 localities and examined by the formalin-ether sedimentation technique. Of the inhabitants examined, 3,441 (14.3%) were found to harbor various types of intestinal parasite eggs, cysts or larvae. Numbers of infected people were 2,661 (11.1%) for Clonorchis sinensis, 431 (1.8%) for heterophyids, 226 (0.9%) for Entamoeba spp., 57 (0.2%) for Giardia lamblia, 30 (0.1%) for Trichuris trichiura, and 18 (0.07%) for echinostomes. Prevalence rates of clonorchiasis according to the river basin were 17.1% in Nakdong-gang, 11.2% in Seomjin-gang, 5.5% in Youngsan-gang and 4.6% in Guem-gang. Of the 2,661 C. sinensis egg-positive cases, 57.7% was male. The present findings suggest that clonorchiasis is still highly prevalent among inhabitants in the riverside areas of southern Korea, and it is necessary to implement a systematic control program in the endemic areas.
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