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Haplorchis infections in intermediate hosts from a clonorchiasis endemic area in Meinung, Taiwan, Republic of China

Published online by Cambridge University Press:  15 April 2024

Jiun-Jye Wang ,
Lee-Yii Chung ,
June-Der Lee ,
Eddy-Essen Chang ,
Eng-Rin Chen ,
David Chao  and
Chuan-Min Yen
Jiun-Jye Wang
Affiliation:
Department of Parasitology, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City, Taiwan, Republic of China
Lee-Yii Chung
Affiliation:
Department of Parasitology, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City, Taiwan, Republic of China
June-Der Lee
Affiliation:
Department of Parasitology, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City, Taiwan, Republic of China
Eddy-Essen Chang
Affiliation:
Department of Parasitology, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City, Taiwan, Republic of China
Eng-Rin Chen
Affiliation:
Department of Parasitology, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City, Taiwan, Republic of China
David Chao
Affiliation:
Department of Biological Sciences, National Sun Yat-Sen University, 70 Lien-Hai Road, Kaohsiung, Taiwan, Republic of China
Chuan-Min Yen*
Affiliation:
Department of Parasitology, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City, Taiwan, Republic of China
*
* Author for correspondence, Fax: 886-7-3218309, Email: chmiye@cc.kmu.edu.tw
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Abstract

Snails and freshwater fish were examined from four ponds in the Meinung township in which Clonorchis sinensis was known to be endemic 18 years ago. No metacercariae were found in 478 Tilapia nilotica, whereas of 451 Ctenopharyngodon idellus examined, 16.2%, 3.3% and 0.9% were found to be infected with Haplorchis pumilio, H. taichui and Clonorchis sinensis, respectively. In addition, there were some unidentified metacercariae in 12.0% of Ctenopharyngodon idellus examined. Overall, no positive correlation between infection rates and sizes of infected fish was shown. Six species of snails were collected in this survey and two frequently-occurring snails, Melanoides tuberculata and Thiara granifera were commonly infected with H. pumilio. Reasons for the prevalence of Haplorchis species and the absence of Clonorchis sinensis in fish and snail hosts in a previously reported endemic area for human clonorchiasis are discussed.

Type
Research Article
Information
Journal of Helminthology , Volume 76 , Issue 2 , June 2002 , pp. 185 - 188
Copyright
Copyright © Cambridge University Press 2002

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