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Korean J Parasitol > Volume 6(3):1968 > Article

Original Article
Korean J Parasitol. 1968 Dec;6(3):77-99. English.
Published online Mar 20, 1994.  http://dx.doi.org/10.3347/kjp.1968.6.3.77
Copyright © 1968 by The Korean Society for Parasitology
Studies on the metacercariae from fresh water fishes in the Kum-Ho River
Jong Taek Lee, M.D.
Department of Preventive Medicine, School of Medicine, Kyungpook National University, Taegu, Korea.
Abstract

The distribution and the infestation rates of metacercariae in fishes from the Kum-Ho river were observed from June 1965 to August l967.

The results obtained are as follows:

1) The Fourteen kinds of metacercariae; Exorchis oviformis, Metorchis orientalis, Cyathocotyle species, Metacercaria hasegawai, Clonorchis sinensis, Metagonimus species, Pseudexorchis major, Echinochasmus species, Centrocestus species, Prosorhpynchus species, and four kinds of unidentified species, A, B, C and D were detected from 12 kinds of fishes.

2) Clonorchis sinensis, Metagonimus species, Echinochasmus species, and Centrocestus species of the detected 14 kinds of flukes were noted to be parasited in man; Metorchis orientalis and Cyathocotyle species in avian species; and Exorchis ovifomis and Pseudexorchis major in wels, but the definite host of the other 6 kinds of flukes were not identified.

3) Exorchis oviformis was found in 64.5%, of all kinds of fishes, Cyathocotyle species in 36.8% of 7 kinds of fishes, Metacercaria hasegawai in 36.3% of 8 kinds, Clonorchis sinensis in 95.0% of 6 kinds and Metagonimus species in 47.9% of 10 kinds.

4) Concerning the infested rates of metacercaria and the length of fishes, Exorchis oviformis and Clonorchis sinensis showed increased rate by the length of fishes but the rest of fishes showed no relationship between them.

5) The infested degree of metacercaria of Clonorchis sinensis was highest in Pseudorasbora parva with 34.3 parasites per cubic cm of flesh, of Exorchis oviformis in Carassius carassius with 7.3, of Cyathocotyle species in Acheilognathus with 6.0, and of Metacercaria hasegawai in Pseudogobio esocinus with 5.7 but Prosorhpynchus etc. were very few in all kinds of fishes.

7) The infested rates of metacercaria in the four kinds of fishes, Pseudorasbora parva, Pungtungia herzi, Pseudogobio esocinus and Gnathopogon coreanus seemed not to be influenced by season, Spring and Autumn. In the infested rates of metacercariae by parts of fishes, Exorchis oviformis was chiefly infested in scales and fins; Metorchis orientalis, Cyathocotyle species, Clonorchis sinensis, Pseudexorchis major, Centrocestus species and Prosorhpynchus ecinatus were chiefly infested in muscle; Metacercaria hasegawai in muscle and fins; Metagonimus species chiefly in scales; and Echinochasmus chiefly in gills.

Figures


Fig. 1
Exorchis oviformis (400×).


Fig. 2
Metorchis orientalis (400×).


Fig. 3
Cyathocotyle species (400×).


Fig. 4
Metacercaria hasegawai (400×).


Fig. 5
Clonorchis sinensis (400×).


Fig. 6
Metagonimus species (400×).


Fig. 7
Pseudexorchis major (400×).


Fig. 8
Echinochasmus species (400×).


Fig. 9
Centrocestus species (400×).


Fig. 10
Prosorhpynchus species (400×).


Fig. 11
Undetermined metacercaria A (400×).


Fig. 12
Undetermined metacercaria B (400×).


Fig. 13
Undetermined metacercaria C (400×).


Fig. 14
Undetermined metacercaria D (400×).

Tables


Table 1
Distribution of encysted metacercariae of digenetic trematodes in Pseudorasbora parva (1965. 6~1967.8)

Number of fish examined :56

Body length of fish :65~110mm.



Table 2
Distribution of encysted metacercariae of digenetic trematodes in Pungtungia herzi (1965. 6~1967. 8)

Number of fish examined :61

Body length of fish :52~137mm.



Table 3
Distribution of encysted metacercariae of digenetic trematodes in Pseudogobio esocinus (1965. 6~1967. 8)

Number of fish examined :50

Body length of fish :81~158mm.



Table 4
Distribution of encysted metacercariae of digenetic trematodes in Gnathopogon coreanus (1965. 6~1967. 8)

Number of fish examined :58

Body length of fish :55~120mm.



Table 5
Distribution of encysted metacercariae of digenetic trematodes in Sarcocheilichthys wakiyae (1965. 6~1967. 8)

Number of fish examined :36

Body length of fish :89~121mm.



Table 6
Distribution of encysted metacercariae of digenetic trematodes in Hemibarbus labeo (1965. 6~1967. 8)

Number of fish examined :39

Body length of fish :65~110mm.



Table 7
Distribution of encysted metacercariae of digenetic trematodes in Zacco platypus (1965. 6~1967. 8)

Number of fish examined :31

Body length of fish :80~115mm.



Table 8
Distribution of encysted metacercariae of digenetic trematodes in Carassius carassius (1965. 6~1967. 8)

Number of fish examined :60

Body length of fish :75~120mm.



Table 9
Distribution of encysted metacercariae of digenetic trematodes in Cyprinus carpio (1965. 6~1967. 8)

Number of fish examined :52

Body length of fish :88~230mm.



Table 10
Distribution of encysted metacercariae of digenetic trematodes in Coreobagrus brevicorpus (1965. 6~1967. 8)

Number of fish examined :24

Body length of fish :65~120mm.



Table 11
Distribution of encysted metacercariae of digenetic trematodes in Coreoleuciscus splendidus (1965. 6~1967. 8)

Number of fish examined :5

Body length of fish :121~130mm.



Table 12
Distribution of encysted metacercariae of digenetic trematodes in Acheilognathus and Acanthorthodeus species (1965. 6~1967. 8)

Number of fish examined :50

Body length of fish :54~90mm.



Table 13
Relationships between body length of fishes and rates of infection of Exorchis oviformis metacercariae in 12 fresh-water fish species (1965. 6~1967. 8)


Table 14
Relationships between body length of fishes and rates of infection of Cyathocotyle species metacercariae in 7 fresh-water fish species (1965. 6~1967. 8)


Table 15
Relationships between body length of fishes and rate of infection of Metacercaria hasegawai in 8 fresh-water fish species (1965. 6~1967. 8)


Table 16
Relationships between body length of fishes and rates of infection of Clonorchis sinensis metacercariae among 6 fresh-water fish species (1965. 6~1967. 8)


Table 17
Numerical distribution of Clonorchis sinensis metacercariae per cm3 of flesh volume among 6 fresh-water fish species (1965. 6~1967. 8)


Table 18
Relationships between body length of fishes and rate of infection of Metagonimus species metacercariae in 10 fresh-water fish species (1965. 6~1967. 8)


Table 19
Seasonal variation of encysted metacercarial infection of digenetic trematodes among 4 fresh-water fish species (1965. 6~1967. 8)


Table 20
Infective percentage and habitat of various encysted metacercariae infected among 12 fresh-water fish species in the Kum-Ho river, Taegu, Korea

References
1. Choi DW, Shin DS, Lee SW. [Studies on the larval trematodes from brackish water fishes: I. Observation of Centrocestus asadai Mishima, 1959]. Korean J Parasitol 1964;2(1):14–19.
 
2. Choi DW, Lee JT, Hwang HK, Shin YD. [Studies Of The Larval Trematodes From Brackish Water Fishes: 2. Observation On Metagonimus Yokogawai Katsurada, 1912]. Korean J Parasitol 1966;4(1):33–37.
 
3. Choi DW, Lee SW, Kim JM, Kim JK. [Studies on the larval trematodes from brackish water crabs. Studies on a kind of Levinseniella]. Korean J Parasitol 1965;3(1):31–38.
 
4. Shin DS. [Epidemiological studies of Clonorchis sinensis prevailed in the peoples of Kyungpook Province]. Korean J Parasitol 1964;2(1):1–13.
 
5. Yamaguti S. Jpn Jour Zool 1933;5(1):1–134.
6. Yamaguti S. Trematodes of fishes 1934;4(3):253–536.
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