title: Naturally occurring apicomplexan acute interstitial pneumonitis in thick-billed parrots (Rhynchopsitta pachyrhyncha).
abstract: This report describes acute interstitial pneumonitis due to an apicomplexan parasite with schizogony in endothelial cells of pulmonary vessels accompanied by early and metrocyte stages of sarcocysts in the heart of a thick-billed parrot (Rhynchopsitta pachyrhyncha). The pattern of this disease is similar to that of the acute phase (approximately 10-15 days postinoculation) of experimental infections of budgerigars, Melopsittacus undulatus, with high doses of sporocysts of Sarcocystis falcatula.
authors.affiliation: Department of Pathology and Laboratory Medicine, College of Medicine, Texas A&M University, College Station 77843-1114.
authors.forename: J H
authors.initials: JH
authors.lastname: Smith
authors.forename: T M
authors.initials: TM
authors.lastname: Craig
authors.forename: E A
authors.initials: EA
authors.lastname: Dillard
authors.forename: P J
authors.initials: PJ
authors.lastname: Neill
authors.forename: L P
authors.initials: LP
authors.lastname: Jones
mesh_terms: D000208:Acute Disease; D000818:Animals; D001715:Bird Diseases / Q000469:parasitology*; D006321:Heart / Q000469:parasitology; D008168:Lung / Q000469:parasitology / Q000473:pathology; D008174:Lung Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary; D010311:Parrots / Q000469:parasitology*; D011563:Psittaciformes / Q000469:parasitology*; D011658:Pulmonary Fibrosis / Q000469:parasitology / Q000662:veterinary*; D012522:Sarcocystis / Q000302:isolation & purification*; D012523:Sarcocystosis / Q000469:parasitology / Q000662:veterinary*