title: A retrospective study of non-suppurative encephalitis in beef cattle from western Canada.
abstract: Non-suppurative encephalitis occurs sporadically in beef cattle in western Canada, leading to loss of animals. This retrospective study investigated the presence of viral, bacterial, and protozoal antigens or DNA in 37 western Canadian feedlot cattle with non-suppurative encephalitis for which a cause had not been identified. Cases were selected based on the age of the animal (> 7 months), and clinical history of recumbency and depression. The identification of rabies in 1 case stresses the importance of including this viral disease in the list of differential diagnoses. Because there was variation in the severity, distribution, and type of lesions, it is possible that there may be more than 1 cause, but failure to identify an infectious agent might also suggest that non-infectious agents could play a role.
authors.affiliation: Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B4 (Sánchez, Clark, Wobeser, Philibert); Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta T2N 1N4 (Janzen).
authors.forename: Sergio
authors.initials: S
authors.lastname: Sánchez
authors.forename: Edward G
authors.initials: EG
authors.lastname: Clark
authors.forename: Gary A
authors.initials: GA
authors.lastname: Wobeser
authors.forename: Eugene D
authors.initials: ED
authors.lastname: Janzen
authors.forename: Hélène
authors.initials: H
authors.lastname: Philibert
mesh_terms: D000818:Animals; D001921:Brain / Q000473:pathology; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology* / Q000473:pathology; D002691:Chlamydophila psittaci; D004660:Encephalitis / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary*; D005260:Female; D007150:Immunohistochemistry / Q000662:veterinary; D008297:Male; D016133:Polymerase Chain Reaction / Q000662:veterinary; D009956:Psittacosis / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary; D012189:Retrospective Studies; D012525:Saskatchewan / Q000453:epidemiology