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Korean J Parasitol > Volume 22(1):1984 > Article

Original Article
Korean J Parasitol. 1984 Jun;22(1):43-50. English.
Published online Mar 20, 1994.  http://dx.doi.org/10.3347/kjp.1984.22.1.43
Copyright © 1984 by The Korean Society for Parasitology
Studies on intestinal trematodes in Korea XII. Two cases of human infection by Stellantchasmus falcatus
Byong Seol Seo,Soon Hyung Lee,Jong Yil Chai and Sung Jong Hong
Department of Parasitology and Institute of Endemic Diseases, College of Medicine, Seoul National University, Korea.

Two cases of human infection by Stellantchasmus falcatus (Heterophyidae) were identified by collection of adult worms during the treatment of some tapeworm infections in Korea. The cases were 24 (Case 1) and 55-year old (Case 2) males residing in Seoul. The Case 1 had gastrointestinal troubles such as diarrhea and abdominal pain, and heart problems such as palpitation and arrhythmia, revealing the eggs of Diphyllobothrium latum in the feces. The Case 2 complained indigestion and discharge of tapeworm (Taenia saginata) segments. Praziquantel at the dose of 15-20 mg/kg body weight and 30 g magnesium salt were given to them for treatment of the tapeworm infection and the discharged strobilae were identified. However, concommitantly with the tapeworms, 188 and 5 specimens of S. falcatus were collected from Case 1 and Case 2 respectively through stereomicroscopy of the diarrheal stools. The Case 1 was infected also with 3 other kinds of heterophyid flukes. They said to have eaten raw brackish water fish such as mullets which are considered to be the source of heterophyid fluke infections.


Figs. 1-4
Fig. 1. Adult worm of S. falcatus collected from Case 1 (Scale: 0.1mm).

Fig. 2.Ibid from Case 1 showing a little different size of seminal vesicle (expulsor) and width of ceca (Same magnification).

Fig. 3.Ibid form Case 1 showing nearly round formexpulsor (Same magnification).

Fig. 4.Ibid from Case 2 (Same magnification). Note the relatively larger body size, bipartite seminal vesicle (large arrow, proximal part; small arrow, expulsor), thick intestinal ceca, etc.

Figs. 5-6
Fig. 5. Magnification of Fig. 4 near themiddle portion of body (Scale: 0.05mm). Note the location of ventrogenital sac (arrows) in relation to the expulsor part of seminal vesicle.

Fig. 6. Higher magnification of ventrogenital sac (arrows) and semianl vesicle with ejaculatory duct (Scale: 0.02mm). Note the characteristic intrauterine eggs.


Table 1
Meaurements* of adult S. falcatus in comparison with those by previous authors (unit: mm)

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