{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,6]],"date-time":"2026-03-06T05:10:21Z","timestamp":1772773821398,"version":"3.50.1"},"reference-count":20,"publisher":"Korean Society for Parasitology","issue":"6","license":[{"start":{"date-parts":[[2019,12,31]],"date-time":"2019-12-31T00:00:00Z","timestamp":1577750400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/3.0\/"}],"content-domain":{"domain":["parasitol.kr"],"crossmark-restriction":true},"short-container-title":["Korean J Parasitol"],"abstract":"<i>Gymnophalloides<\/i> <i>seoi<\/i> (Digenea: Gymnophallidae) is a human intestinal trematode contracted by eating raw oysters (<i>Crassostrea<\/i> <i>gigas<\/i>) in the Republic of Korea (=Korea). It has been known to be highly endemic in Aphae Island, Shinan-gun, Jeollanam-do (Province). However, recent epidemiological status of <i>G<\/i>. <i>seoi<\/i> has not been reported since the 1990s. In this study, we investigated the prevalence of <i>G<\/i>. <i>seoi<\/i> metacercariae in natural and cultured oysters collected from 3 islands and 2 coastal areas in western parts of Korea. The oysters were examined using the artificial digestion method followed by stereomicroscopy. The overall positive rate of <i>G<\/i>. <i>seoi<\/i> metacercariae in natural oysters was 66.0% (99\/150), and the oysters collected from Yubu Island showed the highest infection rate (74.0%). However, the metacercarial density per oyster was relatively low (1.5-2.4 per oyster). By contrast, no metacercaria was found in cultured oysters purchased from 2 coastal areas in Chungcheongnam-do. Thus, we could confirm that natural oysters produced from 3 western coastal islands are infected with <i>G<\/i>. <i>seoi<\/i> <i>metacercariae<\/i>, whereas cultured oysters purchased from 2 coastal areas were free from infection.<\/jats:p>","DOI":"10.3347\/kjp.2019.57.6.705","type":"journal-article","created":{"date-parts":[[2020,1,2]],"date-time":"2020-01-02T04:05:11Z","timestamp":1577937911000},"page":"705-708","update-policy":"https:\/\/doi.org\/10.3347\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Survey of Gymnophalloides seoi Metacercariae in Natural and Cultured Oysters from Several Western Coastal Areas, 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