title: Chronic rhinitis and sinusitis in budgerigars (Melopsittacus undulatus).
abstract: The microscopic lesions in the nasal cavity, nasal bones, and infraorbital sinuses of five budgerigars with chronic upper respiratory tract infection are described. All five had chronic inflammation of the lining of the air spaces within the bones surrounding the nares and infraorbital sinuses.
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000473:pathology*; D002908:Chronic Disease; D011563:Psittaciformes; D012220:Rhinitis / Q000473:pathology / Q000662:veterinary*; D012852:Sinusitis / Q000473:pathology / Q000662:veterinary*