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Centrocestus formosanus (Digenea: Heterophyidae) Encysted in the Freshwater Fish, Puntius brevis, from Lao PDR

Korean Journal of Parasitology 2008년 46권 1호 p.49 ~ 53
한은택 ( Han Eun-Taek ) - 강원대학교 의과대학 기생충학교실

김재립 ( Kim Jae-Lip ) - 서울대학교 의과대학 기생충학교실
신은희 ( Shin Eun-Hee ) - 서울대학교 의과대학 기생충학교실
채종일 ( Chai Jong-Yil ) - 서울대학교 의과대학 기생충학교실
임한종 ( Rim Han-Jong ) - 고려대학교 의과대학 기생충학교실
 ( Phommakorn Souvanny ) - Ministry of Public Health
 ( Sengvilaykham Bounthong ) - Ministry of Public Health

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.

키워드

Centrocestus formosanus;Metacercaria;Adult;Heterophyid fluke;Fish
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