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Korean J Parasitol. 2009 Sep;47(3):311-314.
Published online 2009 August 28.  doi: 10.3347/kjp.2009.47.3.311.
Copyright © 2009 by The Korean Society for Parasitology
Echinostome Infections in the Striped-Field Mouse, Apodemus agrarius, and the Ussuri White-Toothed Shrew, Crocidura lasiura, Caught Near the Demilitarized Zone, Gyeonggi-do (Province), Republic of Korea
Jong-Yil Chai,1 Jae-Hwan Park,1,† Bong-Kwang Jung, Sang-Mee Guk,1 Jae-Lip Kim,1 Eun-Hee Shin,1,2 Terry A. Klein,3 Heung-Chul Kim,4 Sung-Tae Chong,4 Luck Ju Baek,5 and Jin-Won Song5
1Department of Parasitology, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul 110-799, Korea.
2Seoul National University Bundang Hospital, Gyeonggi-do 463-707, Korea.
3Forth Health Protection and Preventive Medicine, 65th Medical Brigade, Unit 15281, APO AP 96205-5281, Korea.
45th Medical Detachment, 168th Multifunctional Medical Battalion, 65th Medical Brigade, Unit 15247, APO AP 96205-5247, Korea.
5Department of Microbiology, College of Medicine, Korea University, Seoul 136-701, Korea.

Corresponding author (Email: cjy@snu.ac.kr )
* †Deceased.

Received May 21, 2009; Revised July 30, 2009; Accepted August 03, 2009.

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Abstract

A total of 1,498 small mammals (rodents and insectivores), including Apodemus agrarius (n = 1,366), Crocidura lasiura (54), Mus musculus (32), Micronytus fortis (28), Eothenomys regulus (9), Micronys minutes (6), and Cricetulus triton (3), were live-trapped in Gyeonggi-do (Province) (Paju-si, Pocheon-gun, and Yeoncheon-gun) near the demilitarized zone (DMZ) from December 2004 to September 2005. A. agrarius was found to be infected with 3 species of echinostomes (Echinostoma hortense,Echinostoma cinetorchis, and Euparyphium murinum), while C. lasiura was infected with 1 species (Echinochasmus japonicas) of echinostome. Other mammals were free from echinostome infections. Total 16 E. hortense were detected in 7 (0.5%) mice, 9 E. cinetorchis from 5 (0.4%), and 3 E. murinum from 2 (0.1%) out of 1.366 A. agrarius examined. E. japonicus was found only in 1 (1.9%; total 3 specimens) C. lasiura. These results demonstrate that A. agrarius and C. lasiura, inhabiting near the DMZ of Gyeonggi-do serve as the natural definitive hosts for several species of echinostomes, although their infection rates are low. This is the first record of natural infections of A. agrarius with E. cinetorchis and C. lasiura with E. japonicus in the Republic of Korea.

Keywords: Echinostoma hortense, Echinostoma cinetorchis, Euparyphium murinum, Echinochasmus japonicus, striped field mouse, Apodemus agrarius, shrew, Crocidura lasiura, DMZ.
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