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KMID : 0425120240620010001
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Parasites, Hosts and Diseases
2024 Volume.62 No. 1 p.1 ~ p.29
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Infection characteristics of Metagonimus species (Digenea: Heterophyidae) metacercariae in fish from major rivers of Korea
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Sohn Woon-Mok
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Abstract
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This article analyzed the infection characteristics of metacercariae of Metagonimus spp.
(MsMc) in fish from 9 major water systems in Korea. A total of 19,568 fish in 87 specieswere examined over a period of 10 years (2011?2020). MsMc were detected in fish fromall 44 survey areas in 9 water systems. Most of the surveyed sites showed very low andlow infection levels (66.7%), while 33.3% of the areas, such as Tamjin-gang and Seomjin-gang, revealed moderate and high infection levels. High endemicity depends on theabundance of susceptible fish species, especially sweet smelt (Plecoglosus altivelis).
The susceptibility index (SI) with MsMc in index fish, Zacco spp., was very low and lowlevels in 62.0%, moderate in 28.0%, and high in 10.0% regions. The SI was highest inthe following order: Yeongam-cheon (283.8), Hoeng-cheon (192.3), Togyo-jeosuji (131.2),Deokcheon-gang (119.1), and Joyang-gang (106.3). The recent infection status of MsMcin P. altivelis was analyzed by the survey localities. In addition, except for P. altivelis, 9fish species were highly infected with MsMc in some survey areas, including Zaccoplatypus, Z. koreanus, Z. temminckii, Opsariichthys uncirostris, Rhynchocypris oxycephalus, Carassius auratus, Acheilognathus rhombeus, Onchorhynchus masou, and Tribolodon hakonensis. In Korea, 74 fish species (15 families) are collectively listed as secondintermediate hosts of Metagonimus spp. This review provides several novel characteristics of MsMc infection and clarifies the fish species of second intermediate host ofMetagonimus spp. in this country.
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KEYWORD
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Metagonimus spp., metacercaria, endemicity, susceptibility index, second intermediate fish host
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