Survey of Zoonotic Trematode Metacercariae in Fish from Irrigation Canal of Togyo-jeosuji (Reservoir) in Cheorwon-gun, Gangwon-do, Republic of Korea

The infection status of zoonotic trematode metacercariae (ZTM) was investigated in total 568 freshwater fishes (19 species) from the irrigation canal of Togyo-jeosuji (Reservoir) in Cheorwon-gun, Gangwon-do, the Republic of Korea for 3 years (2018-2020). All fishes were examined using the artificial digestion method. The metacercariae of Clonorchis sinensis (CsMc) were detected in 180 (43.8%) out of 411 fish of positive species, and their infection intensity was 38 per fish infected (PFI). Especially, in 2 fish species, i.e., Pseudorasbora parva and Puntungia herzi, the prevalence was 82.1% and 31.3%, and the infection intensity with CsMc was 88 and 290 PFI, respectively. Metagonimus spp. metacercariae (MsMc) were found in 403 (74.1%) out of 544 fish of positive species, and their infection intensity was 62 PFI. In the pale chub, Zacco platypus, the prevalence of MsMc was 98.6%, and their infection intensity was 144 PFI. Centrocestus armatus metacercariae were detected in 171 (38.9%) out of 440 fish of positive species, and their infection intensity was 1,844 PFI. Echinostoma spp. metacercariae were found in 94 (19.6%) out of 479 fish of positive species, and their infection intensity was 3 PFI. Metorchis orientalis metacercariae were detected in 43 (29.3%) out of 147 fish of positive species, and their infection intensity was 4 PFI. By the present study, it has been confirmed that some species of ZTM, including CsMc and MsMc, are prevalent in fishes from the irrigation canal of Togyo-jeosuji in Cheorwon-gun, Gangwon-do, Korea.

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High Endemicity with Clonorchis sinensis Metacercariae in Fish from Yongjeon-cheon (Stream) in Cheongsong-gun, Gyeongsangbuk-do, Korea

The Korean Journal of Parasitology ◽

10.3347/kjp.2021.59.1.97 ◽

2021 ◽

Vol 59 (1) ◽

pp. 97-101

Author(s):

Woon-Mok Sohn ◽

Byoung-Kuk Na ◽

Shin-Hyeong Cho ◽

Hee Il Lee ◽

Myoung-Ro Lee ◽

...

Keyword(s):

Clonorchis Sinensis ◽

Infection Intensity ◽

Freshwater Fishes ◽

The Other ◽

Republic Of Korea ◽

Infection Status ◽

Digestion Method ◽

Artificial Digestion ◽

The Republic ◽

Clinostomum Complanatum

The infection status with Clonorchis sinensis metacercariae (CsMc) was examined in freshwater fishes from Yongjeon-cheon (a branch of Nakdong-gang) located in Cheongsong-gun, Gyeongsangbuk-do, the Republic of Korea (Korea). A total of 750 fishes in 19 species were examined by the artificial digestion method for 2 years (2019 and 2020). CsMc were detected in 378 (51.4%) out of 735 fishes in 14 species (73.7%), and the infection intensity was 666 per fish infected. In 2019, CsMc were found in 172 (68.0%) out of 253 fishes in 10 species, and the infection intensity was 565 per fish infected. In 2020, CsMc were detected in 206 (62.2%) out of 331 fishes in 10 species, and the infection intensity was 751 per fish infected. The other zoonotic trematode, ie. Metagonimus spp., Centrocestus armatus, Echinostoma spp. and Clinostomum complanatum, metacercariae were also detected in fishes from the survey streams, but their endemicities were relatively low. Conclusively, it was first confirmed that CsMc are highly endemic in fishes from Yongjeon-cheon in Cheongsong-gun, Gyeongsangbuk-do, Korea.

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Prevalence and Infection Intensity of Zoonotic Trematode Metacercariae in Fish from Soyang-cheon (Stream), in Wanju-gun, Jeollabuk-do, Korea

The Korean Journal of Parasitology ◽

10.3347/kjp.2021.59.3.265 ◽

2021 ◽

Vol 59 (3) ◽

pp. 265-271

Author(s):

Woon-Mok Sohn ◽

Byoung-Kuk Na ◽

Shin-Hyeong Cho ◽

Jung-Won Ju ◽

Cheon-Hyeon Kim ◽

...

Keyword(s):

Fish Species ◽

Clonorchis Sinensis ◽

Infection Intensity ◽

Freshwater Fishes ◽

Infection Status ◽

Digestion Method ◽

Mean Intensity ◽

Artificial Digestion ◽

The Republic ◽

Clinostomum Complanatum

We surveyed on the infection status of zoonotic trematode metacercariae (ZTM) in freshwater fishes from Soyang-cheon (a branch stream of Mangyeong-gang) in Wanju-gun, Jeollabuk-do, the Republic of Korea. A total of 927 fishes were individually examined with the artificial digestion method during 2013-2015 (462 fish in 15 spp.) and 2018-2019 (465 fish in 25 spp.). Clonorchis sinensis metacercariae were detected in 207 (31.4%) out of 659 fishes in 14 positive fish species (PFS), and their mean intensity was 114 per fish infected (PFI). Metagonimus spp. metacercariae were found in 302 (37.4%) out of 808 fishes in 21 PFS, and their mean intensity was 12 PFI. Centrocestus armatus metacercariae were detected in 222 (59.0%) out of 376 fishes in 12 PFS, and their mean intensity was 383 PFI. Echinostoma spp. metacercariae were found in 139 (22.1%) out of 628 fishes in 10 PFS, and their mean intensity was 7 PFI. Clinostomum complanatum metacercariae were detected in 14 (6.5%) out of 214 fishes in 4 PFS, and their mean intensity was 2.4 PFI. Metorchis orientalis metacercariae were detected in 36 (13.5%) out of 267 fishes in 5 PFS, and their mean intensity was 4.3 PFI. Conclusively, the prevalence and infection intensity of ZTM is generally not so high in fishes from Soyang-cheon. However, those of C. sinensis metacercariae are more or less higher in 2 fish species, Pungtungia herzi and Sarcocheilichthys variegatus wakiyae.

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Survey of Zoonotic Trematode Metacercariae in Fish from Water Systems of Geum-gang (River) in Republic of Korea

The Korean Journal of Parasitology ◽

10.3347/kjp.2021.59.1.23 ◽

2021 ◽

Vol 59 (1) ◽

pp. 23-33

Author(s):

Woon-Mok Sohn ◽

Byoung-Kuk Na ◽

Shin-Hyeong Cho ◽

Cheon-Hyeon Kim ◽

Min-Ah Hwang ◽

...

Keyword(s):

Fish Species ◽

Clonorchis Sinensis ◽

Freshwater Fishes ◽

Water Systems ◽

Republic Of Korea ◽

Digestion Method ◽

Mean Intensity ◽

Artificial Digestion ◽

The Republic ◽

Clinostomum Complanatum

The infection status of zoonotic trematode metacercariae (ZTM) was surveyed in freshwater fishes from the water systems of Geum-gang (River) in the Republic of Korea (Korea). A total of 1,161 freshwater fishes from 6 local sites of Geum-gang were examined with the artificial digestion method for 4 years (2012-2015). Clonorchis sinensis metacercariae were detected in 122 (37.2%) out of 328 fishes in the positive fish species from 4 surveyed areas, and their mean intensity was 43 per fish infected. Metagonimus spp. metacercariae were found in 432 (51.7%) out of 835 fishes in the positive fish species from all 6 surveyed areas, and their mean intensity was 30 per fish infected. Centrocestus armatus metacercariae were detected in 285 (75.0%) out of 380 fishes in the positive fish species from 6 surveyed areas, and their mean intensity was 2,100 per fish infected. Echinostoma spp. metacercariae were found in 56 (19.7%) out of 284 fishes in the positive fish species from 5 surveyed areas, and their mean intensity was 10 per fish infected. Clinostomum complanatum metacercariae were detected in 98 (57.3%) out of 171 fishes in the positive fish species from only 2 surveyed areas, and their mean intensity was 11 per fish infected. Conclusively, the endemicity of ZTM is not so high in fishes from water systems of Geum-gang in Korea although it is more or less different by fish species, surveyed areas and ZTM species.

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Infection Status with Digenetic Trematode Metacercariae in Fishes from Coastal Lakes in Gangwon-do, Republic of Korea

The Korean Journal of Parasitology ◽

10.3347/kjp.2019.57.6.681 ◽

2019 ◽

Vol 57 (6) ◽

pp. 681-690 ◽

Cited By ~ 2

Author(s):

Woon-Mok Sohn ◽

Byoung-Kuk Na ◽

Shin-Hyeong Cho ◽

Soon-Won Lee

Keyword(s):

Fish Species ◽

Crucian Carp ◽

Republic Of Korea ◽

Digenetic Trematode ◽

Infection Status ◽

Digestion Method ◽

Coastal Lakes ◽

Artificial Digestion ◽

The Republic

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.

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Survey of Gymnophalloides seoi Metacercariae in Natural and Cultured Oysters from Several Western Coastal Areas, Korea

The Korean Journal of Parasitology ◽

10.3347/kjp.2019.57.6.705 ◽

2019 ◽

Vol 57 (6) ◽

pp. 705-708

Author(s):

Taehee Chang ◽

Bong-Kwang Jung ◽

Hyemi Song ◽

Jaeeun Cho ◽

Sooji Hong ◽

...

Keyword(s):

Infection Rate ◽

Coastal Areas ◽

Republic Of Korea ◽

Digestion Method ◽

Artificial Digestion ◽

Positive Rate ◽

The Republic

Gymnophalloides seoi (Digenea: Gymnophallidae) is a human intestinal trematode contracted by eating raw oysters (Crassostrea gigas) 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 G. seoi has not been reported since the 1990s. In this study, we investigated the prevalence of G. seoi 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 G. seoi 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 G. seoi metacercariae, whereas cultured oysters purchased from 2 coastal areas were free from infection.

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Prevalence of Clonorchis sinensis Infection among Residents along 5 Major Rivers in the Republic of Korea

The Korean Journal of Parasitology ◽

10.3347/kjp.2016.54.2.215 ◽

2016 ◽

Vol 54 (2) ◽

pp. 215-219 ◽

Cited By ~ 26

Author(s):

Young-Il Jeong ◽

Hee-Eun Shin ◽

Sang-Eun Lee ◽

Hyeng-Il Cheun ◽

Jung-Won Ju ◽

...

Keyword(s):

Clonorchis Sinensis ◽

Republic Of Korea ◽

The Republic

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CLONORCHIS SINENSIS INFECTION AND INCREASING RISK OF CHOLANGIOCARCINOMA IN THE REPUBLIC OF KOREA

American Journal of Tropical Medicine and Hygiene ◽

10.4269/ajtmh.2006.75.93 ◽

2006 ◽

Vol 75 (1) ◽

pp. 93-96 ◽

Cited By ~ 106

Author(s):

MIN KYUNG LIM ◽

HYUN-JOO KONG ◽

SEUNG-SIK HWANG ◽

SUE-KYUNG PARK ◽

SUNG-IL CHO ◽

...

Keyword(s):

Clonorchis Sinensis ◽

Republic Of Korea ◽

Increasing Risk ◽

The Republic

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Larval Gnathostomes and Zoonotic Trematode Metacercariae in Fish from a Local Market in Yangon City, Myanmar

The Korean Journal of Parasitology ◽

10.3347/kjp.2020.58.6.701 ◽

2020 ◽

Vol 58 (6) ◽

pp. 701-707

Author(s):

Jong-Yil Chai ◽

Bong-Kwang Jung ◽

Keon Hoon Lee ◽

Jin-Youp Ryu ◽

Hyeon-Seung Kim ◽

...

Keyword(s):

Fish Species ◽

Opisthorchis Viverrini ◽

Trematode Species ◽

Local Market ◽

Infection Status ◽

Digestion Method ◽

Anabas Testudineus ◽

Mean Intensity ◽

Artificial Digestion ◽

Channa Striata

A survey was performed to investigate the infection status of zoonotic helminth larvae in fish from a local market of North Dagon District in Yangon City, Myanmar. A total of 486 fish in 13 species were collected 8 times from December 2015 to December 2019. All fish were transported under ice to a laboratory in Korea and examined for helminth larvae using artificial digestion method. Larval gnathostomes and metacercariae of more than 8 zoonotic trematode species, i.e., Opisthorchis viverrini, Haplorchis taichui, H. pumilio, H. yokogawai, Centrocestus spp., Stellantchasmus falcatus, Pygidiopsis cambodiensis, and Procerovum sp., were detected. Larval gnathostomes were found in 58 (16.0%) out of 362 fish of 6 species, with mean intensity of 2.8 per fish infected. Metacercariae of O. viverrini were detected in 10 (2.9%) out of 349 fish of 5 species, with mean intensity of 16.9 per fish infected. Metacercarial prevalences of 4 intestinal flukes, H. taichui, H. pumilio, H. yokogawai, and Centrocestus spp., were 16.8%, 26.0%, 12.5%, and 15.0% in the positive fish species, respectively, and mean metacercarial intensity was 63.3, 26.8, 86.2, and 8.7 per fish infected. Metacercariae of S. falcatus and P. cambodiensis were detected only from the mullet, Chelon macrolepis. Metacercariae of Procerovum sp. were found in Channa striata and Anabas testudineus. Collectively, it was confirmed that the fish were infected with gnathostome larvae and metacercariae of O. viverrini and intestinal flukes in Yangon City, Myanmar.

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