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SEROEPIDEMIOLOGY OF TOXOCARA CANIS INFECTION AMONG MOUNTAIN ABORIGINAL ADULTS IN TAIWAN

Seroepidemiology of Toxocara canis infection among adults of one ethnic Han and five aboriginal populations residing in mountainous areas of Taiwan was conducted by detecting serum IgG (1:64) using a T. canis larval excretory-secretory antigen-based enzyme-linked immunosorbent assay. A short questionnaire interview was conducted to obtain data concerning their age, sex, occupation, consumption of raw pig liver, and possession of dogs. The overall seroprevalence (46.0%, 247 of 537) in the five aboriginal populations was significantly higher than that of ethnic Han population (30.2%, 13 of 43) (P = 0.04). Age, but not sex, seemed to be a factor related to positive serology. Aboriginal adults who had histories of eating raw pig liver (odds ratio [OR] = 1.65, P < 0.01), raising dogs (OR = 1.76, P < 0.01), or whose occupation was a laborer (OR = 1.78, P < 0.01) seemed to be more apt to be infected by T. canis than those without such histories and unemployed persons.

Received January 20, 2004. Accepted for publication March 10, 2004.

Acknowledgments: We thank H. S. Lee and D. C. Kao for their valuable technical assistance and collection of human sera.

Authors’ addresses: Chia-Kwung Fan, Division of Parasitology, Graduate Institute of Microbiology, National Taiwan University College of Medicine, Section 1, 1 Jen-Ai Road, Taipei 100, Taiwan, Republic of China and Department of Parasitology, College of Medicine, Taipei Medical University, 250 Wu-Hsing Street, Taipei 100, Taiwan, Republic of China. Hung-Shue Lan, Wen-Yuan Du, and Kua-Eyre Su, Division of Parasitology, Graduate Institute of Microbiology, National Taiwan University College of Medicine, Section 1, Jen-Ai Road, Taipei 100, Taiwan, Republic of China, Telephone and Fax: 886-2-22434856; E-mail: kesu{at}ha.mc.ntu.edu.tw. Chien-Ching Hung, Division of Infectious Diseases, Department of Internal Medicine, National Taiwan University Hospital, 7 Chung-Shan South Road, Taipei 100, Taiwan, Republic of China. Wen-Cheng Chung, Department of Parasitology, College of Medicine, Taipei Medical University, 250 Wu-Hsing Street, Taipei 100, Taiwan, Republic of China. Chien-Wei Liao, Institute of Tropical Medicine, National Yang-Ming University, 155 Li-Nong Street, Section 2, Shih-Pai, Taipei 112, Taiwan, Republic of China.

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