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Korean J Parasitol > Volume 33(4):1995 > Article

Original Article
Korean J Parasitol. 1995 Dec;33(4):305-312. English.
Published online Dec 20, 1995.  http://dx.doi.org/10.3347/kjp.1995.33.4.305
Copyright © 1995 by The Korean Society for Parasitology
Demonstration of the second intermediate hosts of Clinostomum complanatum in Korea
Dong-Il Chung,*Hyun-Hee Kong and Chu-Hwan Moon
Department of Parasitology, Kyungpook National University School of Medicine, Taegu 700-422, Korea.
Received September 12, 1995; Accepted November 17, 1995.

Abstract

A species of metacercariae recovered from the fresh-water fish, collected from Kaumji (Pond), Kaechonji (Pond) and Ssanggyechon (River). Uisong-gun, Kyongsangbuk-do, Korea, was identified as Clinostomum complanatum by morphological observation and experimental infection to chicks. The excysted metacercariae, tongue-shaped and progenetic, were 3.28-4.27 mm in length and 0.94-1.46 mm in width. The adult flukes recovered from the chicks four days after infection were 4.20-4.86 mm long and 1.14-1.49 mm wide. Twelve species of the fresh-water fish were found to be infected with the metacercariae. The infection rate ranged from 1.6% (Zacco temminkii) to 88.9% (Acheilognathus rhombea and Microphysogobio yaluensis). The intensity was highest in Carassius auratus (13.0/fish infected) and the abundance (relative density) was highest in A. rhombea (7.8/fish examined). This survey demonstrated for the first time the source of human infection by C. complanatum in Korea.

Figures


Fig. 1
The map showing the surveyed areas of Kaunji (Pond), Kaechonji (Pond) and Ssanggyechon (River), Uisong-gun, Kyungsangbuk-do, Korea.


Fig. 2
A crucian carp, Carassius auratus infected with many metacercariae (arrows) of Clinostomum complanatum.


Fig. 3
A. An acetocarmine stained metacercaria of C. complanatum. Bar indicates 1mm. B. Drauing of A (A, acetabulum; AT, anterior testis; C, cirrus; Ce, ceca; O, ovary; PT, posterior testis; U, uterus). C. Pharyngeal bulb. Bar indicates 0.1 mm. D. Genital opening located at the right side of the anterior testis. Bar indicates 0.2 mm.


Fig. 4
An acetocarmine stained adult worm of C. complanatum recovered from the pharynx of an experimentally infected chick. A. Photomicrograph. B. Drawing of A(A, acetabulum; AT, anterior testis; C, cirrus; Ce, ceca; O, ovary; PT, posterior testis; U, uterus; V, viellaria). Bar indicates 1 mm.

Tables


Table 1
Comparative measurements of the excysted metacercariae of Clinostomum complanatum from different fresh-water fish


Table 2
Comparison of the measurements of C. complanatum adult worms from chicks, a human and herons


Table 3
Infection status with C. complanatum metacercariae in fresh-water fishes collected from Kaumji (Pond), Kaechonji (Pond) and Ssanggyechon (River), Uisong-gun, Kyungsangbuk-do, Korea.

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