Parasites, Hosts and Diseases

The Korea Society for Parasitology and Tropical Medicine (대한기생충학·열대의학회)
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Centrocestus formosanus (Digenea: Heterophyidae) Encysted in the Freshwater Fish, Puntius brevis, from Lao PDR

  • Han, Eun-Taek (Department of Parasitology, Kangwon National University College of Medicine) ;
  • Shin, Eun-Hee (Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center) ;
  • Phommakorna, Souvanny (Department of Hygiene and Prevention, Ministry of Public Health) ;
  • Sengvilaykham, Bounthong (Department of Hygiene and Prevention, Ministry of Public Health) ;
  • Kim, Jae-Lip (Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center) ;
  • Rim, Han-Jong (Department of Parasitology, College of Medicine, Korea University) ;
  • Chai, Jong-Yil (Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center)
  • Published : 2008.03.31
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Abstract

The metacercariae of Centrocestus formosanus, a minute intestinal trematode of mammals and birds, were detected in the freshwater fish, Puntius brevis, from Vientiane Municipality, Lao PDR. The metacercariae were experimentally fed to mice, and adult flukes were recovered in their small intestines 7 days later. The adult flukes were morphologically characterized by having 32 (rarely 34) circumoral spines arranged in 2 alternative rows, a large bipartite seminal vesicle, an oval-shaped ovary, and an X-shaped excretory bladder. Based on these characters, the adults were identified as Centrocestus formosanus (Nishigori, 1924). The taxonomic significance of C. formosanus, in relation to a closely related species, C. caninus (Leiper, 1913), is briefly discussed. It has been first verified by adult worm recovery that C. formosanus is prevalent in Vientiane areas of Lao PDR, taking the freshwater fish, P. brevis, as a second intermediate host.

Keywords

References

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