Parasites, Hosts and Diseases

The Korea Society for Parasitology and Tropical Medicine (대한기생충학·열대의학회)
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Prevalence and Infection Intensity of Zoonotic Trematode Metacercariae in Fish from Soyang-cheon (Stream), in Wanju-gun, Jeollabuk-do, Korea

  • Sohn, Woon-Mok (Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University School of Medicine) ;
  • Na, Byoung-Kuk (Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University School of Medicine) ;
  • Cho, Shin-Hyeong (Division of Vectors and Parasitic Diseases, Korea Disease Control and Prevention Agency) ;
  • Ju, Jung-Won (Division of Vectors and Parasitic Diseases, Korea Disease Control and Prevention Agency) ;
  • Kim, Cheon-Hyeon (Division of Microorganism, Jeollabuk-do Institute of Health and Environment) ;
  • Hwang, Min-Ah (Division of Microorganism, Jeollabuk-do Institute of Health and Environment) ;
  • No, Kyeong-Woo (Division of Microorganism, Jeollabuk-do Institute of Health and Environment) ;
  • Park, Jong-Ho (Division of Microorganism, Jeollabuk-do Institute of Health and Environment)
  • Received : 2021.04.18
  • Accepted : 2021.05.30
  • Published : 2021.06.30
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Abstract

We surveyed on the infection status of zoonotic trematode metacercariae (ZTM) in freshwater fishes from Soyang-cheon (a branch stream of Mangyeong-gang) in Wanju-gun, Jeollabuk-do, the Republic of Korea. A total of 927 fishes were individually examined with the artificial digestion method during 2013-2015 (462 fish in 15 spp.) and 2018-2019 (465 fish in 25 spp.). Clonorchis sinensis metacercariae were detected in 207 (31.4%) out of 659 fishes in 14 positive fish species (PFS), and their mean intensity was 114 per fish infected (PFI). Metagonimus spp. metacercariae were found in 302 (37.4%) out of 808 fishes in 21 PFS, and their mean intensity was 12 PFI. Centrocestus armatus metacercariae were detected in 222 (59.0%) out of 376 fishes in 12 PFS, and their mean intensity was 383 PFI. Echinostoma spp. metacercariae were found in 139 (22.1%) out of 628 fishes in 10 PFS, and their mean intensity was 7 PFI. Clinostomum complanatum metacercariae were detected in 14 (6.5%) out of 214 fishes in 4 PFS, and their mean intensity was 2.4 PFI. Metorchis orientalis metacercariae were detected in 36 (13.5%) out of 267 fishes in 5 PFS, and their mean intensity was 4.3 PFI. Conclusively, the prevalence and infection intensity of ZTM is generally not so high in fishes from Soyang-cheon. However, those of C. sinensis metacercariae are more or less higher in 2 fish species, Pungtungia herzi and Sarcocheilichthys variegatus wakiyae.

Keywords

Acknowledgement

This study was supported by an Anti-Communicable Diseases Control Program, 2013 (Studies on the biological resources of human infecting trematodes and their larval infections in intermediate hosts), 2014 (Investigation of fishborne parasites and acquisition of their biological resources in the southern regions of Korea) and 2015 (Investigation of fishborne parasites and acquisition of their biological resources in the eastern regions of Korea) 2018 & 2019 (Investigation and analysis on the infections of zoonotic trematode metacercariae in fish intermediate hosts in the Republic of Korea) of National Research Institute of Health (NRIH), Korea Centers for Disease Control and Prevention (KCDCP). We thank Jung-A Kim and Hee-Ju Kim, Department of Parasitology and Tropical Medicine, Gyeongsang National University College of Medicine, Jinju, Korea, for their help in fish examinations.

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