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Am. J. Trop. Med. Hyg., 69(4), 2003, pp. 445-446
Copyright © 2003 by The American Society of Tropical Medicine and Hygiene

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SHORT REPORT


SHORT REPORT: IDENTIFICATION OF ECHINOCOCCUS SPECIES FROM A YAK IN THE QINGHAI-TIBET PLATEAU REGION OF CHINA

NING XIAO, JIAMIN QIU, MINORU NAKAO, KAZUHIRO NAKAYA, HIROSHI YAMASAKI, YASUHITO SAKO, WULAMU MAMUTI, PETER M. SCHANTZ, PHILIP S. CRAIG, AND AKIRA ITO
Department of Parasitology and Animal Laboratory for Medical Research, Asahikawa Medical College, Asahikawa, Japan; Sichuan Institute of Parasitic Diseases, Chengdu, Sichuan, China; Division of Parasitic Diseases, National Centers for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia; Bioscience Research Institute, School of Environment and Life Sciences, University of Salford, Great Manchester, United Kingdom

 

ABSTRACT

The species identification of an echinococcal lesion in the liver of a yak in the Qinghai-Tibet plateau region of China, where both Echinococcus granulosus and E. multilocularis are present, was difficult to determine because of the atypical appearance of the lesion. Polymerase chain reaction–based mitochondrial genotyping allowed us to discriminate the Echinococcus species. Nucleotide sequences of the cytochrome c oxidase subunit 1 (cox1) and cytochrome b (cytb) genes amplified from the echinococcal lesion demonstrated that the yak was infected with the E. granulosus G1 genotype (sheep strain).

Received May 21, 2003. Accepted for publication August 5, 2003.

Acknowledgment: We acknowledge the contribution of Dr. Robert L. Rausch whose experience with echinococcal lesions in "aberrant hosts" assisted this investigation. Financial support: This study was supported by the National Institute of Health (1R01 TW01565-01; Principal Investigator, Philip S. Craig) and by Grants-in-Aid from the Ministry of Education, Science, Sports, and Culture of Japan and the Japan Society of Promotion of Science to Akira Ito (1255702414 and 14256001).

Authors’ addresses: Ning Xiao, Minoru Nakao, Kazuhiro Nakaya, Hiroshi Yamasaki, Yasuhito Sako, Wulamu Mamuti, and Akira Ito, Department of Parasitology and Animal Laboratory for Medical Research, Asahikawa Medical College, Midorigaoka-Higashi 2-1, Asahikawa, 078-8510, Japan, Telephone: 81-166-68-2420, Fax: 81-166-68-2429, E-mail: akiraito{at}asahikawa-med.ac.jp. Jiamin Qiu, Sichuan Institute of Parasitic Diseases, Chengdu 610041, Sichuan, China. Peter M. Schantz, Division of Parasitic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, 4770 Buford Highway, Atlanta, GA 30341. Philip S. Craig, Bioscience Research Institute, School of Environment and Life Sciences, University of Salford, Great Manchester, M5 4WT, United Kingdom.




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