While most Entamoeba histolytica appearing in male homosexuals infected with human immunodeficiency virus (HIV) is considered non-invasive in Western countries, and treatment of amebiasis in these persons has received very little attention, in Japan some male homosexual amebiasis patients infected with HIV complain of symptoms attributable to E. histolytica infection. We investigated whether symptomatic E histolytica amebic colitis in HIV-infected persons requires higher doses or longer duration of antiamebic drug therapy than in non HIV-infected patients. Four symptomatic amebic colitis patients infected with HIV-1, three of them severely immunocompromised, with CD4 cell counts <200/mm(3), were treated with oral metronidazole: 1500 mg a day for 10 days in 2 patients, 1000 mg a day for 10 days in 1 patient, and 1000 mg a day for 6 days and then 750 mg for 4 days in 1 patient, and good therapeutic results with no side effects were obtained. This indicates that symptomatic amebic colitis in HIV-infected persons can be successfully treated with metronidazole at the same dose and duration of treatment used in non-HIV-infected persons.
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- A case involving a 59-year-old HIV-positive man revealed how initial testing misdiagnosed his illness, but advanced diagnostics using the FilmArray GI Panel quickly identified E. histolytica in under an hour.
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