{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T21:49:13Z","timestamp":1777931353773,"version":"3.51.4"},"reference-count":40,"publisher":"SAGE Publications","issue":"6","license":[{"start":{"date-parts":[[2000,11,1]],"date-time":"2000-11-01T00:00:00Z","timestamp":973036800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J VET Diagn Invest"],"published-print":{"date-parts":[[2000,11]]},"abstract":"<jats:p>The objectives of this study were to describe the nature and distribution of microscopic lung lesions in feedlot cattle with interstitial pneumonia and to determine whether bovine respiratory syncytial virus (BRSV) antigen was present in affected lungs. Lungs with macroscopic lesions compatible with interstitial pneumonia were collected from cattle from 5 west-central Saskatchewan feedlots that had been on feed for greater than 60 days at the time of death. Interstitial pneumonia was most consistently present in dorsal portions of caudal lung lobes and in 21\/28 cases (75%) had a multifocal to coalescing distribution. All 28 lungs exhibited hyaline membrane formation and some degree of type II alveolar epithelial cell hyperplasia, consistent with an acute to subacute duration. Twenty-one of 28 cases (75%) had concurrent bronchopneumonia in at least 1 lung lobe; bronchopneumonia was grossly evident in 9\/28 cases (32%). Chronic bronchitis or bronchiolitis was present in at least 1 section in 12\/28 (43%) of the lungs, and 25\/28 (89%) had at least 1 focus of bronchiolitis fibrosa obliterans. Bronchopneumonia and bronchiolitis fibrosa obliterans were markedly less common in 10 sets of bovine lungs obtained from an abattoir. Bovine respiratory syncytial virus antigen was demonstrated using immunohistochemistry in 2\/28 cases and was associated with bronchiolar epithelial necrosis that was more severe than the bronchiolar lesions in the BRSV antigen-negative cases. Interstitial pneumonia in feedlot cattle in this study was more frequently associated with suppurative bronchopneumonia and bronchiolitis fibrosa obliterans than with BRSV infection.<\/jats:p>","DOI":"10.1177\/104063870001200604","type":"journal-article","created":{"date-parts":[[2011,5,12]],"date-time":"2011-05-12T16:20:37Z","timestamp":1305217237000},"page":"510-517","source":"Crossref","is-referenced-by-count":26,"title":["Interstitial Pneumonia in Feedlot Cattle: Concurrent Lesions and Lack of Immunohistochemical Evidence for Bovine Respiratory Syncytial Virus Infection"],"prefix":"10.1177","volume":"12","author":[{"given":"Steven D.","family":"Sorden","sequence":"first","affiliation":[{"name":"Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Robert W.","family":"Kerr","sequence":"additional","affiliation":[{"name":"Department of 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