AJTMH Transactions of the Royal Society of Tropical Medicine and Hygiene
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Am. J. Trop. Med. Hyg., 73(5), 2005, pp. 934-935
Copyright © 2005 by The American Society of Tropical Medicine and Hygiene

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SHORT REPORT


AMEBIC COLITIS IN ASYMPTOMATIC SUBJECTS WITH POSITIVE FECAL OCCULT BLOOD TEST RESULTS: CLINICAL FEATURES DIFFERENT FROM SYMPTOMATIC CASES

MAKOTO OKAMOTO*, TAKAO KAWABE, KEN OHATA, GOUICHI TOGO, TETSUYA HADA, TETSUROU KATAMOTO, MASATAKA TANNO, MASAYUKI MATSUMURA, YUTAKA YAMAJI, HIROTSUGU WATABE, TSUNEO IKENOUE, HARUHIKO YOSHIDA, AND MASAO OMATA
Department of Gastroenterology, University of Tokyo, Tokyo, Japan; Department of Gastroenterology and Department of Pathology JR Tokyo General Hospital, Tokyo, Japan; Department of Gastroenterology, Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan

 

ABSTRACT

Amebiasis is a common parasitic infectious disease in developing countries. In developed countries, it is occasionally encountered in travelers to the tropics and in homosexual males. During the past eight years, we detected four cases of amebic colitis among 5,193 subjects who underwent colonoscopy because of positive fecal occult blood test results in a mass screening. All four cases did not have any abdominal symptoms. Ulcerative lesions were observed only in the cecum and ascending colon; another portion of the colon and rectum appeared normal. We may encounter amebic colitis during colonoscopic examination even in subjects who are asymptomatic.

Received January 20, 2005. Accepted for publication May 15, 2005.

* Address correspondence to Makoto Okamoto, Department of Gastroenterology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan. E-mail: okamoto-2im{at}h.u-tokyo.ac.jp

Authors’ addresses: Makoto Okamoto, Yutaka Yamaji, Hirotsugu Watabe, Tsuneo Ikenoue, Haruhiko Yoshida, and Masao Omata, Department of Gastroenterology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan, Telephone: 81-3-3815-5411 extension 33056, Fax: 81-3-3814-0021, E-mail: okamoto-2im{at}h.u-tokyo.ac.jp. Takao Kawabe, Department of Gastroenterology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan and Department of Gastroenterology, JR Tokyo General Hospital, Tokyo, Japan. Ken Ohata, Gouichi Togo, Tetsuya Hada, and Tetsurou Katamoto, Department of Gastroenterology, JR Tokyo General Hospital, Tokyo, Japan. Masataka Tanno, Department of Pathology, JR Tokyo General Hospital, Tokyo, Japan. Masayki Matsumura, Department of Gastroenterology, Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan.




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Copyright © 2005 by the American Society of Tropical Medicine and Hygiene.