Korean J Parasitol.  1998 Sep;36(3):155-161. 10.3347/kjp.1998.36.3.155.

Two endemic foci of heterophyids and other intestinal fluke infections in southern and western coastal areas in Korea

• Chai JY
• Song TE
• Han ET
• Guk SM
• Park YK
• Choi MH
• Lee SH

• KMID: 662559
• DOI: http://doi.org/10.3347/kjp.1998.36.3.155

Abstract

Two endemic foci of heterophyid infections were discovered in coastal villages of Puan-gun, Chollabuk-do, and Sachon-gun. Kyongsangnam-do, Korea. Fecal examinations were performed on 153 inhabitants of Puan-gun and 138 of Sachon-gun, using cellophane thick smear and formalin-ether sedimentation technique. The helminth egg and/or protozoan cyst positive rate was 21.5% (33/153) in Puan-gun and 39.1% (54/138) in Sachon-gun. In Puan-gun, the egg positive rate of heterophyids was the highest, 17.6%, and that of other parasites was 0.7-2.6% by parasite species. In Sachon-gun, that of heterophyids was 18.8%, followed by Clonorchis sinensis (12.3%), and other parasites (0.7-5.0%). Twenth-two (Puan-gun) and six (Sachon-gun) heterophyid egg positive cases were treated with praziquantel, and adult flukes were collected from their diarrheic stools. A total of 3,284 adult flukes of Heterophyes nocens was collected from all of the 22 patients treated in Puan-gun (3-778 individually), and other trematodes were also collected from 2-15 patients: Pygidiopsis summa, Stellantchasmus falcalus. Metagonimus yokogawai, M. miyatai, Stictodora fuscata. Heterophyopsis continua, Acanthoparyphium kurogamo, and Gymnophalloides seoi. In Sachon-gun, M. yokogawai (3,007 specimens), H. nocens (120), and S. falcatus (46) were collected from 5 of 6 treated patients, and H. continua and S. lari each from one patient. The present study revealed that heterophyid flukes, especially H. nocens and M. yokogawai, are prevalent in the southern and western coastal areas of Korea where fresh and/or brackish water fishes are popularly eaten raw.

MeSH Terms

Adolescence
Adult
Age Factors
Aged
Animal
Child
Endemic Diseases*
Feces/parasitology
Female
Heterophyidae*
Human
Intestinal Diseases, Parasitic/parasitology
Intestinal Diseases, Parasitic/epidemiology*
Korea/epidemiology
Male
Middle Age
Parasite Egg Count
Prevalence
Sex Factors
Trematode Infections/parasitology
Trematode Infections/epidemiology*