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Am. J. Trop. Med. Hyg., 74(6), 2006, pp. 1016-1019
Copyright © 2006 by The American Society of Tropical Medicine and Hygiene

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HIGHER SEROPREVALENCE OF ENTAMOEBA HISTOLYTICA INFECTION IS ASSOCIATED WITH HUMAN IMMUNODEFICIENCY VIRUS TYPE 1 INFECTION IN TAIWAN

JIH-JIN TSAI, HSIN-YUN SUN, LIANG-YIN KE, KEH-SUNG TSAI, SUI-YUAN CHANG, SZU-MIN HSIEH, CHIN-FU HSIAO, JENG-HSIEN YEN, CHIEN-CHING HUNG*, AND SHAN-CHWEN CHANG
Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Departments of Internal Medicine and Laboratory Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan; Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan; Division of Biostatistics and Bioinformatics, National Health Research Institutes, Zhunan Town, Taiwan

We assessed the seroprevalence of Entamoeba histolytica infection using indirect hemagglutination antibody (IHA) assay among 667 HIV-infected persons (group A), 1,311 asymptomatic HIV-uninfected persons seeking anonymous HIV testing (group B), 616 HIV-uninfected controls with gastrointestinal symptoms (diarrhea and/or liver abscess) seeking medical care (group C), and 2,500 healthy controls undergoing health check-up (group D). An IHA titer ≥ 128 was detected in 7.1% of group A, 2.5% of group B, 1.8% of group C, and 0.1% of group D (P < 0.0001). The highest seroprevalence (11.2%) was noted among HIV-infected persons who were men having sex with men (MSM) 30–39 years of age. Compared with persons with gastrointestinal symptoms, the adjusted odds ratio for having high IHA titers among HIV-infected persons was 3.206 (95% confidence interval, 1.433, 7.176; P = 0.005). These findings show that HIV-infected persons, especially MSM 30–39 years of age, are at significantly higher risk of E. histolytica infection.

Received November 15, 2005. Accepted for publication February 19, 2006.

Acknowledgment: We thank Dr. Victor L. Yu of University of Pittsburgh for review of the manuscript.

Financial support: This study was supported by the Center for Disease Control, Department of Health, Executive Yuan, Taiwan (DOH94-DC-1017).

* Address correspondence to Chien-Ching Hung, Department of Internal Medicine, National Taiwan University Hospital, 7 Chung-Shan South Road, Taipei 100, Taiwan. E-mail: hcc0401{at}ha.mc.ntu.edu.tw

Authors’ addresses: Jih-Jin Tsai, Liang-Yin Ke, and Jeng-Hsien Yen, 100 Tzyou 1st Road, Kaohsiung, Taiwan 807. Hsin-Yun Sun, Keh-Sung Tsai, Sui-Yuan Chang, Szu-Min Hsieh, Chien-Ching Hung, and Shan-Chwen Chang, 7 Chung-Shan Road, Taipei, Taiwan 100. Chin-Fu Hsiao, 35 Keyan Road, Zhunan Town, Miaoli County, Taiwan 350.




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Copyright © 2006 by the American Society of Tropical Medicine and Hygiene.