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Korean J Parasitol > Volume 35(4):1997 > Article

Original Article
Korean J Parasitol. 1997 Dec;35(4):233-238. English.
Published online Dec 20, 1997.  http://dx.doi.org/10.3347/kjp.1997.35.4.233
Copyright © 1997 by The Korean Society for Parasitology
A new endemic focus of Heterophyes nocens, Pygidiopsis summa, and other intestinal flukes in a coastal area of Muan-gun, Chollanam-do
J Y Chai,*1I M Kim,1M Seo,1S M Guk,1J L Kim,1W M Sohn,2 and S H Lee1
Department of Parasitology, Seoul National University College of Medicine Seoul 110-799, Korea.

*Corresponding author (Email: cjy@plaza.snu.ac.kr)
Received October 13, 1997; Accepted November 10, 1997.


A small coastal village of Muan-gun, Chollanam-do, was surveyed for intestinal fluke infections, especially heterophyids such as Heterophyes nocens and Pygidiopsis summa by fecal examination on 108 inhabitants. The egg positive rate of heterophyids was very high, 75.0%, and that of other parasites was comparatively low, 0.9-3.7% by parasite species. After treatment of 20 patients showing high E.P.G. with praziquantel and purging with MgSO4, total 3,864 specimens of H. nocens were collected from the diarrheic stools of all the patients treated (3-1,338 individually) and total 703 P. summa were harvested from 18 patients (1-170 individually), together with several other species of flukes. Other flukes included Stictodora fuscata (164 specimens from 4 patients), Heterophyopsis continua (2 from 2 patients), and Gymnophalloides seoi (4 from 3 patients). From this study, the surveyed coastal area of Muan-gun, Chollanam-do was proven to be a new endemic focus of H. nocens and P. summa. The occurrence of a few infected cases suggests that this area should also be a low-grade endemic area of S. fuscata, H. continua, and G. seoi.


Fig. 1
Map showing the surveyed area, Muan-gun, Chollanam-do.


Table 1
Results of fecal examination on the inhabitants of Muan-sun (January, 1995)

Table 2
Egg positive rate of heterophyid flukes according to age and sex of the inhabitants

Table 3
Number of flukes collected from heterophyid egg positive cases after praziquantel treatment

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