Parasites, Hosts and Diseases

"Metacercariae"

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Infection Characteristics of Clonorchis sinensis Metacercariae in Fish from Republic of Korea: Woon-Mok Sohn; Korean J Parasitol 2022;60(2):79-96.
Published online April 20, 2022; DOI: https://doi.org/10.3347/kjp.2022.60.2.79

The infection nature of Clonorchis sinensis metacercariae (CsMc) in freshwater fish hosts is closely related to the transmission of human clonorchiasis. This article reviewed the infection characteristics of CsMc in freshwater fish in the Republic of Korea (Korea). The status of CsMc infection was examined in a total of 17,792 cyprinid fish of 49 species in 9 water systems, which included Hantan-/Imjin-gang, Han-gang, Geum-gang, Mangyeong-gang, Yeongsan-gang, Tamjin-gang, Seomjin-gang, Nakdong-gang, and streams in the east coastal areas from 2010 to 2020. The infection status of CsMc was examined according to cyprinid fish species and water systems, after which analyzed by endemicity and susceptibility index. The high endemicity was shown in the cyprinid fish from 3 regions (6.1%) in the upper reaches of Nakdong-gang, such as Banbyeon-cheon (stream), Yongjeon-cheon, and Wi-cheon. The moderate levels were observed in fishes from 8 regions (16.3%), and low endemicity was shown in fishes from 20 regions (40.8%). No CsMc were detected in fish from 18 regions (36.7%). The susceptibility of CsMc in index fish, Puntungia herzi, was found to be a reliable index without examination of other fish species. CsMc infection rates were closely related to subfamily groups in the cyprinid fish hosts in a highly endemic area. In Korea, a total of 58 fish species in 10 families has been listed as the second intermediate hosts for C. sinensis. This review provides several novel features of CsMc infection and clarifies the species of second intermediate freshwater fish host in Korea.

Citations

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Clonorchis sinensis and Cholangiocarcinoma
Eun-Min Kim, Sung-Tae Hong
Journal of Korean Medical Science.2025;[Epub] CrossRef
Multiparasitism in Spain in a Korean Visiting Friends and Relatives: Case Report and Review of Imported Cases of Clonorchis sinensis in Europe
Paola Cociancic, Jacklyn Comas, J. Guillermo Esteban
Clinical Case Reports.2025;[Epub] CrossRef
Clonorchiasis and opisthorchiasis: epidemiology, transmission, clinical features, morbidity, diagnosis, treatment, and control
Men-Bao Qian, Jennifer Keiser, Jürg Utzinger, Xiao-Nong Zhou, Graeme N. Forrest
Clinical Microbiology Reviews.2024;[Epub] CrossRef
Infection characteristics of Metagonimus species (Digenea: Heterophyidae) metacercariae in fish from major rivers of Korea
Woon-Mok Sohn
Parasites, Hosts and Diseases.2024; 62(1): 1. CrossRef
Current status of Clonorchis sinensis and clonorchiasis in Korea: epidemiological perspectives integrating the data from human and intermediate hosts
Won Gi Yoo, Woon-Mok Sohn, Byoung-Kuk Na
Parasitology.2022; 149(10): 1296. CrossRef

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Original Articles

Infections of Digenetic Trematode Metacercariae in Wrestling Halfbeak, Dermogenys pusilla from Bangkok Metropolitan Region in Thailand: Laddawan Patarwut, Thapana Chontananarth, Jong-Yil Chai, Watchariya Purivirojkul; Korean J Parasitol 2020;58(1):27-35.
Published online February 29, 2020; DOI: https://doi.org/10.3347/kjp.2020.58.1.27

Abstract
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This study aimed to investigate metacercarial infections in the wrestling halfbeak, Dermogenys pusilla, collected from Bangkok metropolitan region of Thailand. A total of 4,501 fish from 78 study sites were commonly examined with muscle compression and digestion methods (only head part of fish) during September 2017 to July 2018. The overall prevalence of metacercarial infection was 86.1% (3,876/4,501 individuals), and the mean intensity was 48.9 metacercariae per fish infected. Four species, i.e., Posthodiplostomum sp., Stellantchasmus falcatus, Cyathocotylidae fam. sp., and Centrocestus formosanus, of digenetic trematode metacercariae (DTM) were detected. The prevalences were 65.8%, 52.0%, 2.1%, and 1.2%, respectively and their mean intensities were 23.1, 51.6, 1.4, and 3.2 per fish infected, respectively. The seasonal prevalences were 81.0% in winter, 87.8% in summer and 87.4% in rainy, and the mean intensities were 38.9, 46.6, and 55.2 metacercariae per fish infected, respectively. Conclusively, it was confirmed that the wrestling halfbeak play the role of second intermediate hosts of 4 species of digenetic trematodes including S. falcatus and Posthodiplostomum sp. in Bangkok metropolitan region. And then the metacercariae of C. formosanus and Cyathocotylidae fam. sp. are to be first found in the wrestling halfbeak by this study.

Citations

Citations to this article as recorded by

Systemic infection of Prohemistomum vivax and Cyanodiplostomum encysted metacercariae in African catfish (Clarias gariepinus) from a heavily polluted drain at Giza, Egypt: morphological, molecular and histopathological study
Alaa Eldin Eissa, Olfat A. Mahdy, Eman M. Abouelhassan, Rabia A. El Zlitne, Abdulsalam Abu Mhara, Asmaa K. Al-Mokaddem, Eman H. Rashwan, Reham H. Ragab, Nehal A. Younis
Parasitology International.2026; 111: 103159. CrossRef
Loop‐Mediated Isothermal Amplification Combined With Lateral‐Flow Dipstick for Detection of Centrocestus formosanus in Ornamental Fish
Metawee Sabaijai, Thanawan Tejangkura, Thapana Chontananarth
Journal of Fish Diseases.2025;[Epub] CrossRef
Molecular detection of the zoonotic trematode Centrocestus formosanus (Nishigori, 1924) (Opisthorchiida, Heterophyidae) in Central Europe
Ľubomír Šmiga, Júlia Šmigová, Federica Berrilli, Ingrid Papajová, Peter Lazár, Isabel Guadano-Procesi
Veterinary Research Communications.2025;[Epub] CrossRef
Prevalence of Foodborne Trematodes in Small Indigenous Fish Species in Local Markets of Phnom Penh, Cambodia
Domenico Caruso, Lin Kong, Samnang Keo, Sreyni Yoeurn, Samphal Seng
Vector-Borne and Zoonotic Diseases.2024; 24(3): 141. CrossRef
Alterations in histopathology and stress-associated gene expression induced by infection with Prohemistomum vivax encysted metacercariae in Nile tilapia
Shimaa Abdelkhalek, Marwa M. Attia, Marwa A. Ibrahim, Reda M. S. Korany, Mohamed Abdelsalam, Dalia A. Abdel-moneam
Aquaculture International.2024; 32(4): 5107. CrossRef
Global distribution of zoonotic digenetic trematodes: a scoping review
Yue Hu, Rong-Jian Zhan, Shi-Lin Lu, Yi-Yang Zhang, Min-Yu Zhou, Hui Huang, Ding-Ding Wang, Tao Zhang, Zi-Xin Huang, Yun-Fei Zhou, Zhi-Yue Lv
Infectious Diseases of Poverty.2024;[Epub] CrossRef
Prevalence and identification of cyathocotylid trematodes infecting African catfish in Egypt
Asmaa M. I. Abuzeid, Mahmoud M. Hefni, Amal K. El-Gayar, Yue Huang, Guoqing Li
Parasitology Research.2024;[Epub] CrossRef
Identification and prevalence investigation of cyathocotylid trematode (Trematoda: Digenea: Cyathocotylidae) in Carassius auratus in Wuhu, China
Feng Jiang, Wanyu Zhang, Yang Pan, Xudong Yu, Jiacheng Cao, Ningning Du, Mengyi Zhu, Shengli Gu, Xiaodong Zhan
Veterinary Research Communications.2023; 47(3): 1185. CrossRef
High diversity of trematode metacercariae that parasitize freshwater gastropods in Bangkok, Thailand, and their infective situations, morphologies and phylogenetic relationships
Pichit Wiroonpan, Thapana Chontananarth, Jong-Yil Chai, Watchariya Purivirojkul
Parasitology.2022; 149(7): 913. CrossRef
Immune pathogenesis in pigeons during experimental Prohemistomum vivax infection
Asmaa M. I. Abuzeid, Mahmoud M. Hefni, Yue Huang, Long He, Tingting Zhuang, Guoqing Li
Frontiers in Veterinary Science.2022;[Epub] CrossRef
Cercarial trematodes in freshwater snails from Bangkok, Thailand: prevalence, morphological and molecular studies and human parasite perspective
Pichit Wiroonpan, Thapana Chontananarth, Watchariya Purivirojkul
Parasitology.2021; 148(3): 366. CrossRef

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Infection Status with Digenetic Trematode Metacercariae in Fishes from Coastal Lakes in Gangwon-do, Republic of Korea: Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Soon-Won Lee; Korean J Parasitol 2019;57(6):681-690.
Published online December 31, 2019; DOI: https://doi.org/10.3347/kjp.2019.57.6.681

Abstract
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The infection status of digenetic trematode metacercariae (DTM) was investigated in fishes from coastal lakes in Gangwon-do, the Republic of Korea (Korea). All fishes collected in 5 lakes were examined with the artificial digestion method. More than 10 species, i.e., Metagonimus spp., Pygidiopsis summa, Centrocestus armatus, Metorchis orientalis, M. taiwanensis, Clinostomum complanatum, Echinostoma spp., Stictodora spp., Diplostomum sp. and Diplostomid No. 1. by Morita (1960), of DTM were detected in fishes from 5 coastal lakes in Gangwon-do. Metagonimus spp. metacercariae were found in 52 (41.3%) out of 126 sea rundace, Tribolodon hakonensis, from 5 lakes, and their density was 14.6 per fish infected. P. summa metacercariae were detected in 48 (84.2%) out of 57 mullets from 5 lakes, and their density was 316 per fish infected. C. armatus metacercariae were detected in 7 (14.6%) T. hakonensis and 3 (15.0%) Tridentiger brevispinis from Hyang-ho, and 5 (19.2%) Acanthogobius flavimanus from Gyeongpo-ho. Stictodora spp. metacercariae were found in 4 fish species, i.e., Tridentiger obscurus, Tridentiger trigonocephalus, Chelon haematocheilus, and Acanthogobius lactipes, from Gyeongpo-ho. Total 15 C. complanatum metacercariae were detected in 2 (9.1%) crucian carp, Carassius auratus, from Songji-ho. M. taiwanensis metacercariae were found in T. hakonensis from Hyang-ho and Gyeongpo-ho and in Pseudorasbora parva from Gyeongpo-ho. Total 11 M. orientalis metacercariae were detected in 3 (6.3%) T. hakonensis from Hyang-ho. From the above results, it was confirmed that various species of DTM are infected in fishes from coastal lakes in Gangwon-do, Korea.

Citations

Citations to this article as recorded by

Infection characteristics of Metagonimus species (Digenea: Heterophyidae) metacercariae in fish from major rivers of Korea
Woon-Mok Sohn
Parasites, Hosts and Diseases.2024; 62(1): 1. CrossRef
Re‐evaluation of certain aspects of the EFSA Scientific Opinion of April 2010 on risk assessment of parasites in fishery products, based on new scientific data. Part 2
Ana Allende, Avelino Alvarez‐Ordóñez, Valeria Bortolaia, Sara Bover‐Cid, Alessandra De Cesare, Wietske Dohmen, Laurent Guillier, Lieve Herman, Liesbeth Jacxsens, Maarten Nauta, Lapo Mughini‐Gras, Jakob Ottoson, Luisa Peixe, Fernando Perez‐Rodriguez, Panag
EFSA Journal.2024;[Epub] CrossRef
Survey of Zoonotic Trematode Metacercariae in Fish from Water Systems of Geum-gang (River) in Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Cheon-Hyeon Kim, Min-Ah Hwang, Kyeong-Woo No, Jai-Dong Kim
The Korean Journal of Parasitology.2021; 59(1): 23. CrossRef
Prevalence and Infection Intensity of Zoonotic Trematode Metacercariae in Fish from Soyang-cheon (Stream), in Wanju-gun, Jeollabuk-do, Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Jung-Won Ju, Cheon-Hyeon Kim, Min-Ah Hwang, Kyeong-Woo No, Jong-Ho Park
The Korean Journal of Parasitology.2021; 59(3): 265. CrossRef
Survey of Zoonotic Trematode Metacercariae in Fish from Irrigation Canal of Togyo-jeosuji (Reservoir) in Cheorwon-gun, Gangwon-do, Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Hee Il Lee, Jung-Won Ju, Myoung-Ro Lee, Eun-Joo Lim, Sung Yong Son, Eunmi Ko, Jaeseok Choi
The Korean Journal of Parasitology.2021; 59(4): 427. CrossRef
Endemicity of Zoonotic Trematode Metacercariae in Fish from Deokcheon-gang (River) in Sancheong-gun, Gyeongsangnam-do, Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Hee Il Lee, Jung-Won Ju, Myoung-Ro Lee, Jeong-Gil Park, Jihee Ahn
The Korean Journal of Parasitology.2021; 59(5): 523. CrossRef
First case report of Metorchis orientalis from Black Swan
Yuru Wang, Xin Li, Qingsong Sun, Pengtao Gong, Nan Zhang, Xichen Zhang, Xiaocen Wang, Guojiang Li, Jianhua Li
International Journal for Parasitology: Parasites and Wildlife.2020; 13: 7. CrossRef
Morphological and Molecular Characteristics of Clinostomid Metacercariae from Korea and Myanmar
Eun Jeong Won, Yu Jeong Lee, Moon-Ju Kim, Jong-Yil Chai, Byoung-Kuk Na, Woon-Mok Sohn
The Korean Journal of Parasitology.2020; 58(6): 635. CrossRef

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Infections with Digenetic Trematode Metacercariae in Freshwater Fishes from Two Visiting Sites of Migratory Birds in Gyeongsangnam-do, Republic of Korea: Woon-Mok Sohn, Byoung-Kuk Na; Korean J Parasitol 2019;57(3):273-281.
Published online June 30, 2019; DOI: https://doi.org/10.3347/kjp.2019.57.3.273

Abstract
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The infection status of digenetic trematode metacercariae (DTM) was investigated in fishes from 2 representative visiting sites of migratory birds in Gyeongsangnam-do, the Republic of Korea (Korea). A totaly 220 freshwater fishes (7 species) were collected from Junam-jeosuji (reservoir), and 127 fishes (7 species) were also collected from Woopo-neup (swamp) in June and October 2017. As the control group, total 312 fish (22 spp.) from Yangcheon in Sancheong-gun, Gyeongsangnam-do were also collected in June and October 2017. All fishes collected in 3 sites were examined with the artificial digestion method. In the fishes from Junam-jeosuji, more than 4 species, i.e., Clonorchis sinensis, Echinostoma spp., Diplostomum spp. and Cyathocotyle orientalis, of DTM were detected and their endemicy was very low, 0.70. More than 6 species, i.e., C. sinensis, Echinostoma spp., Metorchis orientalis, Clinostomum complanatum, Diplostomum spp. and C. orientalis, of DTM were found in the fishes from Woopo-neup, and their endemicy was low, 5.16. In the fishes from Yangcheon, more than 8 species, i.e., C. sinensis, Metagonimus spp., Centrocestus armatus, C. complanatum, C. orientalis, M. orientalis, Echinostoma spp., and Diplostomum spp., of DTM were detected, and their endemicity was relatively high, 95.48. The percentages of avian trematode metacercariae (ATM) were 99.6% and 94.7% in fishes from Junam-jeosuji and Woopo-neup whereas it was 74.1% in the control site, Yangcheon. The above findings suggested that migratory birds partly affect in endemicity of DTM in the fish in the 2 visiting sites in Gyeongsangnam-do, Korea.

Citations

Citations to this article as recorded by

Infection characteristics of Metagonimus species (Digenea: Heterophyidae) metacercariae in fish from major rivers of Korea
Woon-Mok Sohn
Parasites, Hosts and Diseases.2024; 62(1): 1. CrossRef
Development of the head collar and collar spines during the larval stages of Isthmiophora hortensis (Digenea: Echinostomatidae)
Woon-Mok Sohn, Won-Jae Jung, Eun-Hee Shin, Jong-Yil Chai
Parasites, Hosts and Diseases.2024; 62(1): 145. CrossRef
Re‐evaluation of certain aspects of the EFSA Scientific Opinion of April 2010 on risk assessment of parasites in fishery products, based on new scientific data. Part 2
Ana Allende, Avelino Alvarez‐Ordóñez, Valeria Bortolaia, Sara Bover‐Cid, Alessandra De Cesare, Wietske Dohmen, Laurent Guillier, Lieve Herman, Liesbeth Jacxsens, Maarten Nauta, Lapo Mughini‐Gras, Jakob Ottoson, Luisa Peixe, Fernando Perez‐Rodriguez, Panag
EFSA Journal.2024;[Epub] CrossRef
The spatial-temporal risk profiling of Clonorchis sinensis infection over 50 years implies the effectiveness of control programs in South Korea: a geostatistical modeling study
Hai-Yan Xiao, Jong-Yil Chai, Yue-Yi Fang, Ying-Si Lai
The Lancet Regional Health - Western Pacific.2023; 33: 100697. CrossRef
Metacercariae in Coprolites of Seals of the Genus Pachyphoca (Cystophorinae, Phocidae) from the Late Miocene of the North Caucasus
K. K. Tarasenko, T. N. Sivkova
Doklady Biological Sciences.2023; 511(1): 277. CrossRef
METACERCARIAE IN COPROLITES OF SEALS OF THE GENUS PACHYPHOCA (CYSTOPHORINAE, PHOCIDAE) FROM THE LATE MIOCENE OF THE NORTH CAUCASUS
K. K. Tarasenko, T. N. Sivkova
Доклады Российской академии наук. Науки о жизни.2023; 511(1): 405. CrossRef
Multiple biochemical indices and metabolomics of Clonorchis sinensis provide a novel interpretation of biomarkers
Yang-Yuan Qiu, Qiao-Cheng Chang, Jun-Feng Gao, Ming-Jia Bao, Hai-Tao Luo, Jin-Ho Song, Sung-Jong Hong, Rui-Feng Mao, Yun-Yi Sun, Ying-Yu Chen, Ming-Yuan Liu, Chun-Ren Wang, Xiao-Lei Liu
Parasites & Vectors.2022;[Epub] CrossRef
Survey of Zoonotic Trematode Metacercariae in Fish from Water Systems of Geum-gang (River) in Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Cheon-Hyeon Kim, Min-Ah Hwang, Kyeong-Woo No, Jai-Dong Kim
The Korean Journal of Parasitology.2021; 59(1): 23. CrossRef
Prevalence and Infection Intensity of Zoonotic Trematode Metacercariae in Fish from Soyang-cheon (Stream), in Wanju-gun, Jeollabuk-do, Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Jung-Won Ju, Cheon-Hyeon Kim, Min-Ah Hwang, Kyeong-Woo No, Jong-Ho Park
The Korean Journal of Parasitology.2021; 59(3): 265. CrossRef
Survey of Zoonotic Trematode Metacercariae in Fish from Irrigation Canal of Togyo-jeosuji (Reservoir) in Cheorwon-gun, Gangwon-do, Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Hee Il Lee, Jung-Won Ju, Myoung-Ro Lee, Eun-Joo Lim, Sung Yong Son, Eunmi Ko, Jaeseok Choi
The Korean Journal of Parasitology.2021; 59(4): 427. CrossRef
Endemicity of Zoonotic Trematode Metacercariae in Fish from Deokcheon-gang (River) in Sancheong-gun, Gyeongsangnam-do, Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Hee Il Lee, Jung-Won Ju, Myoung-Ro Lee, Jeong-Gil Park, Jihee Ahn
The Korean Journal of Parasitology.2021; 59(5): 523. CrossRef
Infection Status with Digenetic Trematode Metacercariae in Fishes from Coastal Lakes in Gangwon-do, Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Soon-Won Lee
The Korean Journal of Parasitology.2019; 57(6): 681. CrossRef
Infections of Two Isthmiophora Species (Digenea: Echinostomatidae) in Wild Mammals from Republic of Korea with Their Morphological Descriptions
Seongjun Choe, Ki-Jeong Na, Youngjun Kim, Dong-Hyuk Jeong, Jeong-Jin Yang, Keeseon S. Eom
The Korean Journal of Parasitology.2019; 57(6): 647. CrossRef

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Brief Communication

Infections with Digenean Trematode Metacercariae in Two Invasive Alien Fish, Micropterus salmoides and Lepomis macrochirus, in Two Rivers in Chungcheongbuk-do, Republic of Korea: Seongjun Choe, Hansol Park, Dongmin Lee, Yeseul Kang, Hyeong-Kyu Jeon, Keeseon S. Eom; Korean J Parasitol 2018;56(5):509-513.
Published online October 31, 2018; DOI: https://doi.org/10.3347/kjp.2018.56.5.509

Abstract
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Present study was performed to survey infection status of digenetic trematode metacercariae in 2 alien fish species, Micropterus salmoides (largemouth bass) and Lepomis macrochirus (bluegill), in 2 rivers draining Chungcheongbuk-do, Republic of Korea. A total of 107 largemouth bass and 244 bluegills were caught in Daecheong-ho (ho=lake) and Musim-cheon (a branch of Geum-gang), in Chungcheongbuk-do April-July 2015. Additionally, 68 native fish of 5 species, i.e., Zacco platypus, Hemibarbus longirostris, Carassius auratus, Pseudogobio esocinus and Puntungia herzi, were caught from the same water bodies. All of the fish collected were examined by artificial digestion method. The metacercariae of Centrocestus armatus, Clinostomum complanatum, Metagonimus sp. and Diplostomum spp. were detected from 4 out of 5 native fish species in Daecheong-ho. However, any metacercariae were not found from 87 M. salmoides and 177 L. macrochirus in Daecheong-ho. In Musim-cheon, metacercariae of Exorchis oviformis and Metacercaria hasegawai were detected from 78% Z. platypus and 34% L. macrochirus, but any metacercariae not found in M. salmoides. We report here that the 2 alien fish species were less infected with the metacercariae than the native ones. Surveys on the metacercariae in the alien fish species in geographically various rivers should be undertaken for better understanding on the role of alien fish species in the trematode infections in Republic of Korea.

Citations

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Infection Characteristics of Clonorchis sinensis Metacercariae in Fish from Republic of Korea
Woon-Mok Sohn
The Korean Journal of Parasitology.2022; 60(2): 79. CrossRef
Characterization of Fish Assemblages and Standard Length Distributions among Different Sampling Gears Using an Artificial Neural Network
Tae-Sik Yu, Chang Woo Ji, Young-Seuk Park, Kyeong-Ho Han, Ihn-Sil Kwak
Fishes.2022; 7(5): 275. CrossRef
Survey of Zoonotic Trematode Metacercariae in Fish from Water Systems of Geum-gang (River) in Republic of Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Cheon-Hyeon Kim, Min-Ah Hwang, Kyeong-Woo No, Jai-Dong Kim
The Korean Journal of Parasitology.2021; 59(1): 23. CrossRef
Diagnosis of Centrocestus formosanus Infection in Zebrafish (Danio rerio) in Italy: A Window to a New Globalization-Derived Invasive Microorganism
Antonino Pace, Ludovico Dipineto, Serena Aceto, Maria Concetta Censullo, Maria Carmen Valoroso, Lorena Varriale, Laura Rinaldi, Lucia Francesca Menna, Alessandro Fioretti, Luca Borrelli
Animals.2020; 10(3): 456. CrossRef
Infection Status with Clonorchis sinensis Metacercariae in Fish from Yangcheon (Stream) in Sancheong-gun, Gyeongsangnam-do, Korea
Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Jung-Won Ju
The Korean Journal of Parasitology.2019; 57(2): 145. CrossRef

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Original Articles

Opisthorchis felineus and Metorchis bilis Metacercariae in Cyprinid Fish Leuciscus idus in Nura-Sarysu River, Kazakhstan: Vladimir S. Kiyan, Aitbay K. Bulashev, Aleksey V. Katokhin; Korean J Parasitol 2018;56(3):267-274.
Published online June 30, 2018; DOI: https://doi.org/10.3347/kjp.2018.56.3.267

Abstract
PDF

Aim
of the present study was to provide presence of opisthorchiid metacercariae in cyprinid fish Leuciscus idus in Nura-Sarysu river, Kazakhstan. Infection rate of the ides by the metacercariae was 42%. The metacercariae, similar morphologically to those of the liver flukes, were found: elliptical in shape, 0.19-0.25×0.15-0.22 mm, oral and ventral suckers nearly equal size, and excretory bladder O-shape with black content, occupying posterior part of the body. The metacercariae were divided into 2 groups with differences in size and thickness of cyst wall. Adult flukes were recovered from the Syrian hamsters infected with the opisthorch metacercariae and identified with morphological characters to Opisthorchis felineus and Metorchis bilis. DNA sequences of ITS1, ITS2, and cox1 supported the taxonomic assignment.

Citations

Citations to this article as recorded by

Molecular differentiation of Opisthorchis felineus and Metorchis bilis in cyprinid fish from Northern Kazakhstan: Epidemiological insights and diagnostic advances
Aiganym Bekaidarovna Bekenova, Aleksey М. Katokhin, Kundyz B. Muratbekova
Veterinary World.2025; : 3197. CrossRef
Prevalence and species identification of trematode metacercariae in Qiqihar, Northeast China
Fengyu Zhang, Jianke Li, Shaocheng Zhang, Ting Chen, Hao Zhang
Frontiers in Microbiology.2024;[Epub] CrossRef
Liver Fluke-Derived Molecules Accelerate Skin Repair Processes in a Mouse Model of Type 2 Diabetes Mellitus
Anna Kovner, Yaroslav Kapushchak, Oxana Zaparina, Dmitry Ponomarev, Maria Pakharukova
International Journal of Molecular Sciences.2024; 25(22): 12002. CrossRef
Molecular genetic species definition of Opisthorchiidae-like cercariae from Bithyniidae snails of Chany Lake (South-Western Siberia, Russia)
Aleksei V. Katokhin, Elena A. Serbina
Parasitology Research.2023; 122(1): 341. CrossRef
Fish-borne trematode infections in wild fishes in Bangladesh
Sharmin S. Labony, M. Abdul Alim, Muhammad Mehedi Hasan, Md. Shahadat Hossain, Ausraful Islam, Mohammad Zahangir Alam, Naotoshi Tsuji, Anisuzzaman
Pathogens and Global Health.2020; 114(2): 91. CrossRef

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Infections with Zoonotic Trematode Metacercariae in Yellowfin Goby, Acanthogobius flavimanus, from Coastal Areas of Republic of Korea: Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho, Jung-Won Ju, Soon-Won Lee, Won-Seok Seok; Korean J Parasitol 2018;56(3):259-265.
Published online June 30, 2018; DOI: https://doi.org/10.3347/kjp.2018.56.3.259

Abstract
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To investigate the infection status of zoonotic trematode metacercariae in yellowfin goby, Acanthogobius flavimanus, from coastal areas of the Republic of Korea (Korea), we examined total 344 gobies from 21 localities with an artificial digestion method from 2013 to 2017. The metacercariae of Stictodora lari were most frequently detected in 45.3% goby from 7 localities, i.e., Taean-gun (Chungcheongnam-do), Gochang-gun (Jeollabuk-do), Muan-gun, Shinan-gun, Haenam-gun (Jeollanam-do), Hadong-gun and Goseong-gun (Gyeongsangnam-do). Their infection rates were 90.0%, 66.7%, 46.7%, 8.0%, 3.3%, 26.7%, and 86.7% and intensities were 1,090, 6.2, 1.6 1.0, 2.0, 2.0, and 7.2 metacercariae per fish infected respectively. Heterophyopsis continua metacercariae were found in 38.2% goby from 6 localities, i.e., Gochang-gun, Muan-gun, Shinan-gun, Gangjin-gun, Boseong-gun (Jeollanam-do) and Goseong-gun, and their intensities were relatively low, 1-21 metacercariae. Stictodora fuscata metacercariae were detected in 61.3% goby from 4 localities, i.e., Taean-gun, Gochang-gun, Hadong-gun and Goseong-gun. Their infection rates were 90.0%, 53.3%, 5.9%, and 73.3% and intensities were 1,081, 3.1, 3.0, and 10.2 metacercariae per fish infected respectively. Heterophyes nocens metacercariae were found in 55.0% goby from Muan-gun and Shinan-gun. Total 3 metacercariae of Isthmiophora hortensis were detected in 2 (8.0%) gobies from Shinan-gun. Total 15 metacercariae of Centrocestus armatus were detected in 5 gobies (33.3%) from Gyeongpo-ho (ho means lake) in Gangneung-si, Gangwon-do. The present study suggests that yellowfin goby, A. flavimanus, acts as the infection sources of zoonotic intestinal flukes in western and southern coastal areas than in eastern coastal areas of Korea.

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The Korean Journal of Parasitology.2018; 56(6): 633. CrossRef

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Brief Communications

Infection Status of Freshwater Crabs and Crayfish with Metacercariae of Paragonimus westermani in Korea: Eun-Min Kim, Jae-Lip Kim, Sung-Il Choi, Soon-Hyung Lee, Sung-Tae Hong; Korean J Parasitol 2009;47(4):425-426.
Published online December 2, 2009; DOI: https://doi.org/10.3347/kjp.2009.47.4.425

Abstract
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The present study investigated the infection status of Paragonimus westermani metacercariae in freshwater crabs (n = 363) and crayfish (n = 31) from October 2007 to October 2008 using the crush method. All of the freshwater crabs, Eriocheir japonicus, were negative for P. westermani metacercariae while 10 (32.3%) of the 31 examined crayfish were positive. The 10 positive crayfish were caught in Haenam, Jeollanam-do, and there were 8-59 (mean 28.4) metacrcariae per infected crayfish. These results suggest that P. westermani metacerariae are still transmitted by crayfish enzootically in southern Korea, and that freshwater crabs may transmit metacercariae only on rare occasions.

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Echinostoma hortense and Heterophyid Metacercariae Encysted in Yellowfin Goby, Acanthogobius flavimanus, from Shinan-gun and Muan-gun (Jeollanam-do), Korea: Woon-Mok Sohn, Byoung-Kuk Na, Shin-Hyeong Cho; Korean J Parasitol 2009;47(3):307-310.
Published online August 28, 2009; DOI: https://doi.org/10.3347/kjp.2009.47.3.307

Abstract
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Fishborne trematode (FBT) metacercariae were investigated in yellowfin goby, Acanthogobius flavimanus, collected from Shinan-gun and Muan-gun, Jeollanam-do (province), Korea. All collected fishes were examined using the artificial digestion method. In all of 15 gobies from Aphae-myeon in Shinan-gun, metacercariae of Stictodora spp. (334 metacercariae/fish), Heterophyes nocens (153/fish), and Heterophyopsis continua (20/fish) were detected. In 2 of 14 gobies from Jido-myeon in Shinan-gun, 8 Echinostoma hortense metacercariae in total were detected. In 15 gobies from Haeje-myeon in Muan-gun, the metacercariae of H. continua were found in 100%, Stictodora spp. in 86.7%, and H. nocens in 6.7% of fish examined. The average numbers of metacercariae per infected fish were 23.3 (H. continua), 416.0 (Stictodora spp.), and 2.0 (H. nocens), respectively. The metacercariae of E. hortense found in gobies were elliptical, with 150 × 138 ?m in average size, and had 27 collar spines on the head crown. The above results suggest that yellowfin gobies from 2 localities may be the potential infection sources of FBT. Moreover, it is proved for the first time that the yellowfin goby, A. flavimanus, acts as a second intermediate host for E. hortense.

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Original Articles

Fishborne Trematode Metacercariae in Freshwater Fish from Guangxi Zhuang Autonomous Region, China: Woon-Mok Sohn, Keeseon S. Eom, Duk-Young Min, Han-Jong Rim, Eui-Hyug Hoang, Yichao Yang, Xueming Li; Korean J Parasitol 2009;47(3):249-257.
Published online August 28, 2009; DOI: https://doi.org/10.3347/kjp.2009.47.3.249

Abstract
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A survey was performed to investigate the infection status of fishborne trematode (FBT) metacercariae in freshwater fish from Guangxi Zhuang Autonomous Region, China. A total of 307 freshwater fish of 31 species were collected from 5 administrative regions of Guangxi Zhuang Autonomous Region. They were examined by artificial digestion method from July 2003 to August 2004. No metacercariae were detected in fish from Fusui-xian. In fish from Mashan-xian and a market in Nanning, 3 species of metacercariae, Haplorchis taichui, Haplorchis pumilio, and Centrocestus formosanus, were mainly detected. Metacercariae (8 in number) of Clonorchis sinensis were found in 1 Chanodichthys dabryi purchased from a market in Nanning. In fish from Yangshuo, Metagonimus yokogawai metacercariae were detected from all 18 fish species examined. Total 13 C. sinensis metacercariae were found in 3 out of 10 Hemibarbus maculatus from Yangshuo. All 7 Zacco platypus from Yangshuo were infected with 8-112 Echinochasmus perfoliatus metacercariae. In fish from Binyang-xian, H. pumilo metacercariae were mainly detected in all 5 fish species examined, and only 1 metacercaria of C. sinensis was found in a Hemiculter leucisculus. From the above results, it was confirmed that some species of freshwater fish play a role of second intermediate hosts for FBT in Guangxi Zhuang Autonomous Region, China. In particular, 4 species of intestinal flukes, M. yokogawai, H. taichui, H. pumilio, and C. formosanus, were prevalent in fish hosts, whereas C. sinensis metacercariae were detected only in 3 fish species.

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Fishborne Trematode Metacercariae Detected in Freshwater Fish from Vientiane Municipality and Savannakhet Province, Lao PDR: Han-Jong Rim, Woon-Mok Sohn, Tai-Soon Yong, Keeseon S. Eom, Jong-Yil Chai, Duk-Young Min, Soon-Hyung Lee, Eui-Hyug Hoang, Bounlay Phommasack, Sithat Insisengmay; Korean J Parasitol 2008;46(4):253-260.
Published online December 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.4.253

Abstract
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Freshwater fish from Vientiane Municipality and Savannakhet Province, Lao PDR were examined by the muscle compression and artificial digestion methods to know the infection status with trematode metacercariae. In the fish from Savannakhet, 2 species of metacercariae, Opisthorchis viverrini and Haplorchis taichui, were detected. O. viverrini metacercariae were found in 6 species of fish, Puntius brevis, Hampala dispar, Esomus metallicus, Mystacoleucus marginatus, Puntioplites falcifer, and Cyclocheilichthys armatus. H. taichui metacercariae were detected in 3 species of fish, P. brevis, P. falcifer, and M. marginatus. In the fish from Vientiane, 4 species of metacercariae, O. viverrini, H. taichui, Haplorchis yokogawai, and Centrocestus formosanus, were detected. Among them, O. viverrini metacercariae were found in 7 species of fish, Onychostoma elongatum, C. armatus, H. dispar, P. brevis, Cyclocheilichthys repasson, Osteochilus hasseltii, and Hypsibarbus lagleri. The metacercariae of H. taichui were detected in 6 species of fish, C. repasson, O. elongatum, C. armatus, H. dispar, Labiobarbus leptocheila, and Cirrhinus molitorella. The metacercariae of H. yokogawai were found in 9 species of fish, C. repasson, O. elongatum, C. armatus, H. dispar, Labiobarbus leptocheila, O. hasseltii. C. molitorella, Hypsibarbus wetmorei, and H. lagleri. The metacercariae of C. formosanus were detected in 4 species of fish, C. repasson, P. brevis, O. hasseltii, and C. molitorella. From these results, it is confirmed that fishborne trematode metacercariae, i.e. O. viverrini, H. taichui, H. yokogawai and C. formosanus, are prevalent in various species of freshwater fish from Savannakhet Province and Vientiane Municipality, Lao PDR.

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Infection Status of Freshwater Fish with Metacercariae of Clonorchis sinensis in Korea: Eun-Min Kim, Jae-Lip Kim, Sung Yil Choi, Jae-Whan Kim, Siwon Kim, Min-Ho Choi, Young Mee Bae, Soon-Hyung Lee, Sung-Tae Hong; Korean J Parasitol 2008;46(4):247-251.
Published online December 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.4.247

Abstract
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This study investigated freshwater fish for their current infection status with metacercariae of Clonorchis sinensis in Korea. Twenty-one species of freshwater fish (n = 677) were collected from 34 regions nationwidely from February 2007 to June 2008. They were individually examined by digestion technique. Eight species of freshwater fish from 17 different regions were recognized positive for the metacercariae of C. sinensis. The positive rates (range of metacercariae number per fish) of fish by the species were as follows: 48% (1-1,142) in Pseudorasbora parva, 60% (1-412) in Pungtungia herzi, 15.7% (1-23) in Pseudogobio esocinus, 29% (1-7) in Acheilognathus intermedia, 21% (1-4) in Odontobutis interrupta, 33% (1-6) in Zacco temmincki, 3.6% (1-4) in Zacco platypus, and 26.3% (1) in Hemibarbus labeo. The two species, P. parva and P. herzi, are able to be the index fish for estimation of C. sinensis transmission in a certain locality. Still several species of freshwater fish are briskly transmitting C. sinensis infection in many riverside areas of southern Korea.

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Prevalence of Zoonotic Metacercariae in Two Species of Grouper, Epinephelus coioides and Epinephelus bleekeri, and Flathead Mullet, Mugil cephalus, in Vietnam: Dung The Vo, Darwin Murrell, Anders Dalsgaard, Glenn Bristow, Dung Huu Nguyen, Thanh Ngoc Bui, Dung Thi Vo; Korean J Parasitol 2008;46(2):77-82.
Published online June 20, 2008; DOI: https://doi.org/10.3347/kjp.2008.46.2.77

Abstract
PDF

Fishborne zoonotic metacercariae have not been reported from brackish water and marine fish from Vietnam waters although these parasites are common in the country's freshwater fish. Both wild-caught and cultured grouper (Epinephelus coioides and Epinephelus bleekeri), and mullet (Mugil cephalus) from brackish and marine waters located in Khanh Hoa province in central coastal Vietnam were examined, and found positive for zoonotic trematode metacercariae. From grouper, Heterophyopsis continua and Procerovum varium were recovered. The prevalence of H. continua ranged from 2.0 to 6.0% and that for P. varium ranged from 11.6 to 15.8%. Mullet were infected with Pygidiopsis summa and H. continua; both of these species are new records for Vietnam. The prevalence of P. summa in mullet was generally high, ranging from 17.6 to 75.5%, and was significantly higher than the prevalence of H. continua (2.5 to 32.4%). There were no significant differences in the prevalence of metacercariae between grouper from natural or cultured habitats, indicating that the highest risk of infection occurs in the wild-caught state prior to their placement in culture. Further, there was no difference in metacercarial prevalence between the 2 species of grouper. Infected wild-caught seed were only observed from January to October. Monthly variation in prevalence suggests seasonal variation in mullet infections occurs in this region with the highest transmission taking place from October to December. Basic investigations on the ecology and epidemiology of these intestinal flukes need to be carried out to determine their significance as a public health problem and the aspects of their biology that may be vulnerable to control interventions.

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Brief Communications

Postmetacercarial changes in Echinostoma caproni maintained in a defined medium plus calf serum: Bernard Fried, Aditya Reddy; Korean J Parasitol 2000;38(3):173-175.
Published online September 30, 2000; DOI: https://doi.org/10.3347/kjp.2000.38.3.173

Abstract
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The present study examined postmetacercarial changes in the excysted metacercariae of Echinostoma caproni maintained in the defined medium Mixture 199 plus 20% calf serum for 7 days at 41℃. The gas phase was atmospheric air. Each culture was inoculated with 25 excysted metacerariae. Cultures were maintained upright in closed 15 ml plastic centrifuge tubes each containing 10 ml of medium plus 200 units of penicillin/ml and 200 ?g of streptomycin/ml. By 4 days in culture, most metacercariae had voided their excretory concretions. Organisms were clumped or solitary at the bottom of the cultures. Many organisms showed flaring of the oral collar and extension of both the collar and tegumentary spines. By 4 days in culture, posterior protuberances or bumps were noted on many of the organisms and some organisms showed abnormal vesicular growths or blebs at their posterior ends. Some mortality was noted in culture by day 5, but most organisms were still alive when the cultures were terminated on day 7.

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In vitro excystation of Echinostoma paraensei (Digenea: Echinostomatidae) metacercariae assessed by light microscopy, morphometry and confocal laser scanning microscopy
Joyce Souza, Juberlan Garcia, Renata H. Neves, José Roberto Machado-Silva, Arnaldo Maldonado
Experimental Parasitology.2013; 135(4): 701. CrossRef

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Infection status of Paragonimus westermani metacercariae in crayfish (Cambaroides similis) collected from Bogildo (Islet), Wando-gun, Chollanam-do, Korea: Myeong-Heon Shin, Duk-Young Min; Korean J Parasitol 1999;37(1):55-57.
Published online March 31, 1999; DOI: https://doi.org/10.3347/kjp.1999.37.1.55

Abstract
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During the period from October 1996 to November 1998, the infection status of Paragonimus westermani metacercariae in freshwater crayfish (Cambaroides similis) collected from Bogildo (islet), Wando-gun, Chollanam-do, which is known for an endemic area of P. westermani in Korea, were examined. The average infection rate of Paragonimus metacercariae in crayfish was 88.6%, and mean number of metacercariae per infected crayfish was 30.2. This metacercarial density was the highest in the group of weight in 7.1-9.0 g. These results suggest that the natural life cycle of P. westermani is still well-preserved in Bogildo.

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Recent Incidence of Paragonimus westermani Metacercariae in Freshwater Crayfish, Cambaroides similis, from Two Enzootic Sites in Jeollanam-do, Korea
Jin-Ho Song, Fuhong Dai, Xuelian Bai, Tae-Im Kim, Hyun-Jong Yang, Tong-Soo Kim, Shin-Hyung Cho, Sung-Jong Hong
The Korean Journal of Parasitology.2017; 55(3): 347. CrossRef
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Devendra Kumar Biswal, Manish Debnath, Graciously Kharumnuid, Welfrank Thongnibah, Veena Tandon, Govindhaswamy Umapathy
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Diseases of crayfish: A review
Matt Longshaw
Journal of Invertebrate Pathology.2011; 106(1): 54. CrossRef
Infection Status of Freshwater Crabs and Crayfish with Metacercariae of Paragonimus westermani in Korea
Eun-Min Kim, Jae-Lip Kim, Sung-Il Choi, Soon-Hyung Lee, Sung-Tae Hong
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Gary W. Procop
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Young-Bae Chung, Hirohito Kita, Myeong Heon Shin
The Korean Journal of Parasitology.2008; 46(2): 95. CrossRef
Cysteine Protease Secreted byParagonimus westermaniAttenuates Effector Functions of Human Eosinophils Stimulated with Immunoglobulin G
W. A. Petri, Myeong Heon Shin, Hirohito Kita, Hae Young Park, Ju Young Seoh
Infection and Immunity.2001; 69(3): 1599. CrossRef

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Original Article

Discovery of Gymnophalloides seoi metacercariae in oysters from islands of the West Sea known as the habitats of paleartic oystercatchers: Woon-Mok Sohn, Yong-Suk Ryang, Jong-Yil Chai, Soon-Hyung Lee; Korean J Parasitol 1998;36(3):163-169.
Published online September 30, 1998; DOI: https://doi.org/10.3347/kjp.1998.36.3.163

Abstract
PDF

An epidemiological survey was performed to know the infection status of oysters with Gymnophalloides seoi metacercariae in 7 islands of the West Sea known as the habitat of paleartic oystercatchers, Haematopus ostralegus osculans, in Korea. The surveyed areas were Aphaedo (Shinan-gun, Chollanam-do), Jangjado, Sonyudo and Munyodo (Okdo-myon, Kunsan-shi, Chollabuk-do), Yubudo (Changhang-up, Sochon-gun Chungchongnam-do), and Polumdo and Chumoondo (Sodo-myon, Kangwha-gun. Inchon-shi). The oysters collected from Aphaedo, the known endemic focus, were examined monthly from August 1995 to October 1996 for observation of any seasonal variation of the metacercarial density. The average metacercarial burden was 761-2,077 by month, but the seasonal variation of the metacercarial density was not obvious. A total of 54 metacercariae was detected in 63 oysters collected from Yubudo. Out of 30 oysters from Sonyudo, 25 (83.3%) were infected with 1-66 metacercariae (12.6 in average). All of 50 oysters (100%) from Munyodo were infected with 3-162 metacercariae (53.5 in average). Only 4 metacercariae were detected in 100 oysters from Chumoondo. However, no metacercariae were found in 55 oysters from Jangjado and 50 oysters from Polumdo. From the above results, it was confirmed that G. seoi is still highly prevalent in oysters from Aphaedo, and several islands of the West Sea known as the habitats of paleartic oystercatchers are new endemic areas of this fluke.

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Prevalence and Density of Digenetic Trematode Metacercariae in Clams and Oysters from Western Coastal Regions of the Republic of Korea
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