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Korean J Parasitol > Volume 24(1):1986 > Article

Original Article
Korean J Parasitol. 1986 Jun;24(1):77-81. English.
Published online Mar 20, 1994.  http://dx.doi.org/10.3347/kjp.1986.24.1.77
Copyright © 1986 by The Korean Society for Parasitology
Two cases of natural human infection by Echinostoma hortense
Sang Kum Lee,Nak Seung Chung,Ill Hyang Ko,*Haeng Ill Ko and Jong Yil Chai
*Department of Clinical Pathology and Internal Medicine, Seoul Paik Hospital, Inje Medical College, Korea.
Department of Parasitology and Institute of Endemic Diseases, College of Medicine, Seoul National University, Korea.

Two cases of human Echinostoma hortense infection were found in Seoul Paik Hospital. Their stools revealed echinostomatid eggs. After treatment with praziquantel (single does of 10-12 mg/kg) and purgation with magnesium salt, total 21 flukes were collected in one case. The flukes were 5.9-7.5 mm long, had 27-28 collar spines around their head, laterally deviated ovary and two tandem testes. They were identified as E. hortense Asada, 1926. The cases are 38-year and 20-year old men residing in Seoul, whose hometown is Chungsong-gun and Seungju-gun, Kyongsangbuk-do respectively. They had eaten raw flesh of various kinds of fresh water fishes (both cases) and/or salamander (latter case), which are considered possible sources of this fluke infection. They experienced abdominal discomfort and/or diarrhea. Hematology revealed 22 percent eosinophilia in the latter case, but it became 5 percent after the treatment. Echinostomatid eggs were not found after the treatment in both cases. These are the 4th and 5th human cases of E. hortense infection in Korea.


Fig. 1
Egg of E. hortense in stool of Case I. Scale: 20µm.

Fig. 2
Adule E. hortense recovered from Case I after treatment with praziquantel. Acetocarmine stained. Scale: 1mm.


Table 1
Laboratory findings of E. hortense cases

Table 2
Measurements of E. hortense collected from the present Case I

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