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Common Viral Diseases of Pet Birds (African grey parrots)—Pacheco’s Disease
Pacheco’s DiseasePsittacine herpesvirus is an alpha herpesvirus that is the causative agent of Pacheco’s disease and internal papillomatosis in parrots. Pacheco’s disease causes a viral hepatitis seen predominantly in New World species (African greys, Amazon parrots, macaws, and conures). Internal papillomatosis occurs in parrots that have survived Pacheco’s disease. Papillomatosis is most commonly observed in