Successful treatment of human Entamoeba polecki infection with metronidazole

A 24-year-old woman with Entamoeba polecki infection was succesfully treated with metronidazole in a dosage of 750 mg orally thrice daily for 5 days. Examination of two direct smears and two formalin-ether concentrates from specimens collected at 2 days, 1 week, 1 month, and 2 months after the conclusion of therapy revealed no amebae. An indirect hemagglutination test for antibodies to E. histolytica gave a low positive titer of 1:128.