title: Pneumocystis carinii pneumonia in foals.
abstract: Pneumocystis carinii pneumonia was diagnosed in 3 foals. In 2 foals (No. 1 and 2), diagnosis was by histologic evaluation of pulmonary tissue. On retrospective evaluation, P carinii cysts were found on sediment smears of bronchoalveolar lavage fluid in 1 foal (No. 1). A different foal (No. 3) was diagnosed as having pneumocytosis by finding P carinii cysts in bronchoalveolar lavage fluid, and was treated successfully. Definitive diagnosis of pneumocytosis in animals is usually made at necropsy. However, careful cytologic evaluation in bronchoalveolar lavage fluid sediment can provide a diagnosis in some cases, allowing for initiation of appropriate treatment.
authors.affiliation: Department of Veterinary Pathology, College of Veterinary Medicine, Oklahoma State University, Stillwater 74078.
authors.forename: P J
authors.initials: PJ
authors.lastname: Ewing
authors.forename: R L
authors.initials: RL
authors.lastname: Cowell
authors.forename: R D
authors.initials: RD
authors.lastname: Tyler
authors.forename: C G
authors.initials: CG
authors.lastname: MacAllister
authors.forename: J H
authors.initials: JH
authors.lastname: Meinkoth
mesh_terms: D000818:Animals; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology* / Q000382:microbiology; D005260:Female; D006734:Horse Diseases / Q000473:pathology*; D006736:Horses; D008168:Lung / Q000382:microbiology / Q000473:pathology; D008297:Male; D011010:Pneumocystis / Q000302:isolation & purification; D011020:Pneumonia, Pneumocystis / Q000473:pathology / Q000662:veterinary*