title: Prevalence of clonorchiasis in southern endemic areas of Korea in 2006.
abstract: 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.
authors.affiliation: Department of Malaria and Parasitic Diseases, National Institute of Health, Korea Centers for Disease Control and Prevention, Seoul 122-701, Korea.
authors.forename: Shin-Hyeong
authors.initials: SH
authors.lastname: Cho
authors.forename: Ki-Yeon
authors.initials: KY
authors.lastname: Lee
authors.forename: Byung-Chul
authors.initials: BC
authors.lastname: Lee
authors.forename: Pyo-Yun
authors.initials: PY
authors.lastname: Cho
authors.forename: Hyeong-Il
authors.initials: HI
authors.lastname: Cheun
authors.forename: Sung-Tae
authors.initials: ST
authors.lastname: Hong
authors.forename: Woon-Mok
authors.initials: WM
authors.lastname: Sohn
authors.forename: Tong-Soo
authors.initials: TS
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D003003:Clonorchiasis / Q000453:epidemiology*; D003004:Clonorchis sinensis; D019353:Endemic Diseases; D005243:Feces / Q000469:parasitology; D005260:Female; D006801:Humans; D007723:Korea / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D010270:Parasite Egg Count; D015995:Prevalence; D045483:Rivers