Enterocytozoon bieneusi multiorgan microsporidiosis in a HIV-infected patient.

Multiorgan microsporidiosis due to Enterocytozoon bieneusi was diagnosed in an HIV-infected patient. The parasite was found and identified as E. bieneusi by transmission electron microscopy in stools, duodenal biopsy, nasal discharge and sputum. No clinical improvement or parasite eradication was obtained after albendazole therapy, but the patient remained alive 9 months after diagnosis.