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

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

The Korean Journal of Parasitology ◽

10.3347/kjp.2021.59.4.427 ◽

2021 ◽

Vol 59 (4) ◽

pp. 427-432

Author(s):

Woon-Mok Sohn ◽

Byoung-Kuk Na ◽

Shin-Hyeong Cho ◽

Hee Il Lee ◽

Jung-Won Ju ◽

...

Keyword(s):

Clonorchis Sinensis ◽

Infection Intensity ◽

Republic Of Korea ◽

Irrigation Canal ◽

Infection Status ◽

Pseudorasbora Parva ◽

Digestion Method ◽

Artificial Digestion ◽

The Republic ◽

Pale Chub

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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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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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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Infection status of Clinostomum complanatum (Rudolphi, 1819) metacercaria from Channa punctatus of Meerut District

Journal of Applied and Natural Science ◽

10.31018/jans.v3i2.197 ◽

2011 ◽

Vol 3 (2) ◽

pp. 280-283 ◽

Cited By ~ 2

Author(s):

Bindu Sharma ◽

Vidushi Rani ◽

Ayushi Chaudhary

Keyword(s):

Digenetic Trematode ◽

Infection Status ◽

Present Communication ◽

Female Fish ◽

Male And Female ◽

Mean Intensity ◽

Length Group ◽

Infection Susceptibility ◽

One Year ◽

Clinostomum Complanatum

Metacercaria Clinostomum complanatum is a digenetic trematode, which is mainly found in fresh water fishes. Present communication deals with the infection status of C. complanatum in C. punctatus of Meerut district, which is supported by the data spreading over one year. About 250 specimens of C. punctatus from different ponds of Meerut were studied through regular periodical collection in the year Jan 2010 to Dec 2010. Overall prevalence 35.6%, mean intensity 3.06 and abundance 1.09 were reported. The infection was maximum in winter and minimum in rainy season. Prevalence, intensity and abundance of the infestation were also found to be related to different length group and sex of the hosts, the medium sized fishes were more infected and the larger size fishes were less infected while the smaller size fishes showed moderate infection. Susceptibility of infection was not significantly different between male and female fish.

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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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Infection status with plerocercoid of ligulid tapeworm in cyprinid fish from three lakes in Republic of Korea

Helminthologia ◽

10.2478/helm-2018-0012 ◽

2018 ◽

Vol 55 (3) ◽

pp. 251-255

Author(s):

H. B. Song ◽

G. M. Park

Keyword(s):

Genetic Analysis ◽

Fish Species ◽

Cyprinid Fish ◽

Republic Of Korea ◽

Infection Status ◽

Zacco Platypus ◽

Current Infection ◽

The Republic ◽

Infection Density

Summary We have investigated freshwater cyprinid fish for its current infection status with plerocercoid of ligulid tapeworm in the Republic of Korea. A total of 6,049 (517 Euiam Lake and 4,071 Hoengseong Lake in Gangweon-do and 1,461 Chungju Lake in Chungcheongbuk-do) fish were examined by dissecting the peritonial cavity between March 2015 and December 2016. Totally 45 (0.74 %) fish in of 5 (26.3 %) species (8 Squalidus japonicus coreanus, 6 Squalidus gracilis majimae, 7 Opsariichthys uncirostris amurensis, 15 Zacco platypus and 9 Erythroculter erythropterus) were infected with plerocercoids of ligulid tapeworm. The infection density with plerocercoids in Erythroculter erythropterus was 12 – 26 per fish infected in Erythroculter erythropterus, and 1 – 2 in other 4 fish species. The plerocercoid was ivory-white and 26.2 – 57.8 cm long. The prevalence value in this survey was 0.9 % (45/6,049). The genetic analysis in this study was conducted to identify plerocercoid species. Based on genetic analysis with data in GenBank, these plerocercoids were identified as the L. intestinalis.

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Parasitism of Cichlasoma paranaense Kullander, 1983 and Gymnotus carapo Linnaeus, 1814 by Clinostomum complanatum (Rudolphi, 1814) Metacercariae in the Taquari river

Brazilian Journal of Biology ◽

10.1590/s1519-69842005000300017 ◽

2005 ◽

Vol 65 (3) ◽

pp. 513-519 ◽

Cited By ~ 10

Author(s):

A. T. Silva-Souza ◽

G. Ludwig

Keyword(s):

Condition Factor ◽

Infected Fish ◽

Expected Value ◽

Yellow Spot ◽

Total Weight ◽

Intensity Of Infection ◽

Mean Intensity ◽

Spot Disease ◽

Relative Condition Factor ◽

Clinostomum Complanatum

The infection, known as yellow spot disease, produced by metacercariae of Clinostomum spp. was studied in fishes of the Taquari river, located in Jataizinho, Paraná State, Brazil. A total of 1,582 specimens, belonging to 36 species, were collected between March 1999 and April 2001. Yellow spot disease was observed only in Gymnotus carapo Linnaeus, 1814 (Gymnotiformes, Gymnotidae) and Cichlasoma paranaense Kullander, 1983 (Perciformes, Cichlidae). This parasitism was generated by metacercariae of Clinostomum complanatum (Rudolphi, 1814) (Digenea, Clinostomidae). Among the 88 specimens of G. carapo examined, 7 (prevalence = 8%) had cysts of the parasite. Four of them were captured in July 1999 and three in October 1999. In the other months, no specimen found was infected. Using relative condition factor (Kn) analysis, it was determined that both infected and non-infected specimens had a total weight equal to the theoretically expected value for each total length (Kn = 1.0). Among 56 individuals of Cichlasoma paranaense, 6 (prevalence = 10.7%) had between 1 and 27 metacercariae of C. complanatum (mean intensity of infection = 9.3 ± 9.6). In March 1999 and April of both 2000 and 2001, the specimens examined were not infected. The infected fish had a total weight higher than the expected value (Kn > 1.0), while the non-infected fish had a weight equal to the expected value (Kn = 1.0).

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The distribution, conservation status and factors affecting the survival of indigenous freshwater fishes in the Cape Province

Koedoe ◽

10.4102/koedoe.v23i1.636 ◽

1980 ◽

Vol 23 (1) ◽

Cited By ~ 19

Author(s):

I. G Gaigher ◽

K.C.D Hamman ◽

S.C Thorne

Keyword(s):

South African ◽

Industrial Development ◽

Environmental Changes ◽

Conservation Status ◽

Freshwater Fishes ◽

Human Settlement ◽

Factors Affecting ◽

Red Data Book ◽

Data Book ◽

The Republic

Fifteen of the 36 indigenous freshwater fishes of the Cape Province are endemic to this region and a further eight are endemic to the Republic of South Africa. A third of the species are listed in the South African Red Data Book - Fishes. The distribution and conservation status of each species, excluding eels, are described. The possible effect of environmental changes, such as farming and other forms of land use, exotics, mining, industrial development, human settlement and construction of dams, are discussed and conservation measures are proposed.

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