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Korean J Parasitol > Volume 32(3):1994 > Article

Original Article
Korean J Parasitol. 1994 Sep;32(3):143-147. English.
Published online Sep 20, 1994.  http://dx.doi.org/10.3347/kjp.1994.32.3.143
Copyright © 1994 by The Korean Society for Parasitology
Stictodora fuscatum (Heterophyidae) metacercariae encysted in gobies, Acanthogobius flavimanus
W M Sohn,*1J Y Chai,2 and S H Lee2
1Department of Parasitology, College of Medicine, Inje University, Pusan 614-735, Korea.
2Department of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul 110-799, Korea.
Received August 09, 1994; Accepted August 25, 1994.

Abstract

The metacercariae of the genus Stictodora encysted in gobies, Acanthogobius flavimanus, purchased from a local market of Haenam-gun, Chollanam-do, were identified as those of S. fuscatum. A total of 1,437 metacercariae were collected from 30 gobies and some of them were orally fed to cats in order to obtain the adult worms. The metacercariae were 0.194-0.301 mm by 0.168-0.270 mm in size, yellowish brown, round to elliptical, and with a thin and transparent cyst wall. The excysted larvae were 0.280-0.423 mm long and 0.150-0.184 mm wide, beset with numerous tegumental spines on the anterior half of the body, and equipped with a characteristic ventrogenital sac. Total 21 adult worms were recovered from 2 cats 7 days after infection. The adult worms were small, leaf-like, 0.514-0.918 mm long and 0.235-0.377 mm wide. The ventrogenital sac was elliptical and its gonotyl was armed with 13-18 spines which were radially arranged and appeared as fan-shape. It has been confirmed that A. flavimanus is a second intermediate host of S. fuscatum in Korea.

Figures


Figs. 1-5
Fig. 1. A metacercaria of S. fuscatum obtained from a goby showing the oral sucker (OS), pharynx (P), ovary (O) and testes (T). Fig. 2. An adult worm of S. fuscatum recovered from a cat on the day 7 postinfection. Fig. 3. Ventrogenital sac and its gonotyl of the worm in Fig. 2. Fig. 4. Ibid, another worm. Note the number and arrangement of gonoty1 spines. Fig. 5. Intrauterine eggs of S. fuscatum, with a thick-shell.


Fig. 6
Schematic drawing (ventral view) of S. fuscatum showing the acetabulum (A), gonoty1 (G), genital atrium (GA), seminal vesicle (SC), ovary (O), teetis (T), seminal receptacle (SR) and Mehlis' gland (MG).

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