Encephalitozoonosis in a parrot.

Encephalitozoon infection was diagnosed in a double yellow-headed Amazon parrot, Amazona ochrocephala. Illness was characterized by respiratory distress, decreased appetite, diarrhea, and weight loss. This gram-positive organism was present in renal tubules, intestine, and lungs. Ultrastructural features consisted of 5 polar filament coils and a single nucleus. Organisms were contained within parasitophorous vacuoles in cytoplasm of the renal tubular epithelium.