Parasites, Hosts and Diseases

The Korea Society for Parasitology and Tropical Medicine (대한기생충학·열대의학회)
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Prevalence of Clonorchis sinensis Metacercariae in Freshwater Fish from Three Latitudinal Regions of the Korean Peninsula

  • Cho, Shin-Hyeong (Division of Malaria and Parasitic Diseases, National Institute of Health, Centers for Disease Control and Prevention) ;
  • Sohn, Woon-Mok (Department of Parasitology and Institute of Health Sciences, Gyeongsang National University School of Medicine) ;
  • Na, Byoung-Kuk (Department of Parasitology and Institute of Health Sciences, Gyeongsang National University School of Medicine) ;
  • Kim, Tong-Soo (Department of Parasitology and Inha Research Institute for Medical Sciences, Inha University College of Medicine) ;
  • Kong, Yoon (Department of Molecular Parasitology, Sungkyunkwan University School of Medicine, Center for Molecular medicine, Samsung Biomedical Research Institute) ;
  • Eom, Kee-Seon (Department of Parasitology and Medical Research Institute, Chungbuk National University College of Medicine) ;
  • Seok, Won-Seok (Infection Disease Intelligence Division, Gangwon Institute of Health and Environment) ;
  • Lee, Tae-Joon (Infection Disease Intelligence Division, Gangwon Institute of Health and Environment)
  • Received : 2011.09.20
  • Accepted : 2011.11.03
  • Published : 2011.12.15
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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 Gyeongsangnamdo: 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.

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References

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