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Korean J Parasitol > Volume 21(1):1983 > Article

Original Article
Korean J Parasitol. 1983 Jun;21(1):6-10. English.
Published online Mar 20, 1994.  http://dx.doi.org/10.3347/kjp.1983.21.1.6
Copyright © 1983 by The Korean Society for Parasitology
Infestation of larval trematodes from fresh-water fish and brackish-water fish in river Taechong, Kyungpook province, Korea
Chong Yoon Joo,Moo-Kil Park and Dong Wik Choi
Department of Parasitology, Kyungook National University, School of Medicine, Taegu, Korea.
Abstract

A study of infestation patterns for larval trematodes from fresh-water fish and brackish-water fish was carried out during the period from June to October in 1982.

They were collected by netting, fishing with rod and line, and using the bait of crushed oil cake in a transparent plastic bowls at the three localities, Daebon-dong, Kugil-dong, and Hoam-dong in the river Taechong, Kyungpook Province, Korea.

Five species of fresh-water fish, the crussian carp, Carassius carassius Linnaeus, the bullhead, Coreobagrus brevicorpus Mori, the fat minnow, Moroco oxycephalus (Bleeker), the flat bitterling, Paracheilognathus rhombea(Temminck et Schlegel), and the catfish, Parasilurus asotus (Linnaeus), and two kinds of brackish-water fish, the grey mullet, Mugil cephalus (Linnaeus) and the sweetfish, Plecoglossus altivelis (Temminck et Schlegel) were examined.

Four species of the metacercariae, Exorchis oviformis, Metacercari hasegawai, Metorchis orientalis and undetermined larvae were found.

Of these, the encysted larvae of the human intestinal fluke, Metagonimus yokogawai, were found from three kinds of fresh-water fish, the crussian carp, the bullhead and the fat minnow and one species of brackish-water fish, the sweetfish and the infestation rates for the larvae varied appreciably from fish to fish.

The intensity of infestation with the Metagonimus larvae in the three species of fresh-water fish as low, and the average number of the larvae per gram of flesh varied from 0.5 to 0.2.

By comparison, the brackish-water fish was more heavily infested and the mean number of cysts per gram of flesh in Plecoglossus altivelis was 109.2. It was found that infection with Metagonimus yokogawai is caused by consuming raw fresh-water fish and brackish-water fish caught in the river Taechong, Kyungpook Province, Korea.

Figures


Fig. 1
Study areas in the vicinity of the river Taechong, Kyungpook Province, Korea.

Tables


Table 1
Fresh-water fish and brackish-water fish caught in River Taechong, Kyungpook Province, Korea (1982)


Table 2
Infestation rates for encysted larvae of digenetic trematodes in flesh of fish (1982)


Table 3
Infestation density of larval trematodes per gram of flesh in 4 kinds of fish (1982)


Table 4
Infestation rates for encysted larvae of digenetic trematodes in scales and fins of fish (1982)

References
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