Intestinal microsporidiosis in a HIV-seronegative patient.

Microsporidial infections have been increasingly reported in immunocompromised patients, particularly those infected with the human immunodeficiency virus (HIV), but only rarely in immunocompetent individuals. We report a case of intestinal microsporidiosis in a HIV-seronegative patient with acute self-limited diarrhoea. Examination of stool specimens revealed plenty of spores that correspond with Enterocytozoon bieneusi in size and shape as well as ultrastructural details.