title: Prevalence of Clonorchis sinensis metacercariae in freshwater fish from three latitudinal regions of the Korean Peninsula.
abstract: A large-scale survey was conducted to investigate the infection status of fresh water fishes with Clonorchis sinensis metacercariae (CsMc) in 3 wide regions, which were tentatively divided by latitudinal levels of the Korean peninsula. A total of 4,071 freshwater fishes were collected from 3 regions, i.e., northern (Gangwon-do: 1,543 fish), middle (Chungcheongbuk-do and Gyeongsangbuk-do: 1,167 fish), and southern areas (Jeollanam-do, Ulsan-si, and Gyeongsangnam-do: 1,361 fish). Each fish was examined by the artificial digestion method from 2003 to 2010. In northern areas, only 11 (0.7%) fish of 2 species, Pungtungia herzi and Squalidus japonicus coreanus from Hantan-gang, Cheolwon-gun, Gangwon-do were infected with av. 2.6 CsMc. In middle areas, 149 (12.8%) fish were infected with av. 164 CsMc. In southern areas, 538 (39.5%) fish were infected with av. 159 CsMc. In the analysis of endemicity in 3 regions with an index fish, P. herzi, 9 (6.2%) of 146 P. herzi from northern areas were infected with av. 2.8 CsMc. In middle areas, 34 (31.8%) of 107 P. herzi were infected with av. 215 CsMc, and in southern areas, 158 (92.9%) of 170 P. herzi were infected with av. 409 CsMc. From these results, it has been confirmed that the infection status of fish with CsMc is obviously different among the 3 latitudinal regions of the Korean peninsula with higher prevalence and burden in southern regions.
authors.affiliation: Division of Malaria and Parasitic Diseases, National Institute of Health, Centers for Disease Control and Prevention, Osong 363-951, Korea.
authors.forename: Shin-Hyeong
authors.initials: SH
authors.lastname: Cho
authors.forename: Woon-Mok
authors.initials: WM
authors.lastname: Sohn
authors.forename: Byoung-Kuk
authors.initials: BK
authors.lastname: Na
authors.forename: Tong-Soo
authors.initials: TS
authors.lastname: Kim
authors.forename: Yoon
authors.initials: Y
authors.lastname: Kong
authors.forename: Keeseon
authors.initials: K
authors.lastname: Eom
authors.forename: Won-Seok
authors.initials: WS
authors.lastname: Seok
authors.forename: Taejoon
authors.initials: T
authors.lastname: Lee
mesh_terms: D000818:Animals; D003003:Clonorchiasis / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D003004:Clonorchis sinensis / Q000302:isolation & purification*; D005393:Fish Diseases / Q000453:epidemiology* / Q000469:parasitology; D005399:Fishes; D005618:Fresh Water; D007723:Korea / Q000453:epidemiology; D058488:Metacercariae; D015995:Prevalence