title: Amebic colitis in asymptomatic subjects with positive fecal occult blood test results: clinical features different from symptomatic cases.
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.
authors.affiliation: Department of Gastroenterology, University of Tokyo, Tokyo, Japan. okamoto-2im@h.u-tokyo.ac.jp
authors.forename: Makoto
authors.initials: M
authors.lastname: Okamoto
authors.forename: Takao
authors.initials: T
authors.lastname: Kawabe
authors.forename: Ken
authors.initials: K
authors.lastname: Ohata
authors.forename: Gouichi
authors.initials: G
authors.lastname: Togo
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Hada
authors.forename: Tetsurou
authors.initials: T
authors.lastname: Katamoto
authors.forename: Masataka
authors.initials: M
authors.lastname: Tanno
authors.forename: Masayuki
authors.initials: M
authors.lastname: Matsumura
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yamaji
authors.forename: Hirotsugu
authors.initials: H
authors.lastname: Watabe
authors.forename: Tsuneo
authors.initials: T
authors.lastname: Ikenoue
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Yoshida
authors.forename: Masao
authors.initials: M
authors.lastname: Omata
mesh_terms: D000818:Animals; D002432:Cecum / Q000469:parasitology / Q000473:pathology*; D003113:Colonoscopy; D004404:Dysentery, Amebic / Q000175:diagnosis / Q000469:parasitology / Q000503:physiopathology*; D004748:Entamoeba histolytica / Q000302:isolation & purification / Q000472:pathogenicity*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009780:Occult Blood