{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,8]],"date-time":"2025-11-08T22:50:13Z","timestamp":1762642213748},"reference-count":41,"publisher":"Oxford University Press (OUP)","issue":"7","license":[{"start":{"date-parts":[[2019,5,9]],"date-time":"2019-05-09T00:00:00Z","timestamp":1557360000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2019,7,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The goal of this study was to compare the cell-mediated immune responses of highly commingled, sale-barn origin calves (STR; n = 10) to those of single source calves that had been weaned for 60 d (UNS; n = 10). Peripheral blood mononuclear cells and neutrophils (PMNs) were isolated from jugular venous blood of each calf. Peripheral blood mononuclear cells were stimulated with Concanavalin A (ConA), BVDV-1, BVDV-2, BHV-1, Mannheimia haemolytica, and Pasteurella multocida and evaluated for clonal proliferation and secretion of IL-8 into cell culture supernatants. The native functional capacities of PMNs were evaluated in response to stimulation with heat-killed Escherichia coli and Staphylococcus aureus. Complete blood counts and serum biochemical profiles were performed for each animal at the time of sample collection. Compared with STR calves, UNS calves had greater lymphocyte proliferative responses following stimulation BVDV1 (P = 0.041), BVDV2 (P = 0.002), BHV-1 (P = 0.001), M. haemolytica (P = 0.016), and P. multocida (P = 0.049). In addition, PMNs isolated from UNS calves had a greater ability to phagocytose E. coli (P = 0.001) and S. aureus (P = 0.003) when compared with STR calves. Serum nonesterified fatty acids were higher in STR calves (P &lt; 0.001). Serum \u03b2-hydroxybutyrate was lower in STR calves (P &lt; 0.003). These data suggest that immunologic and physiologic differences exist between STR and UNS calves. Although the underlying mechanisms for these differences are not clear, it is possible that combinations of energy imbalances, stress-induced immunosuppression, and general immune naivet\u00e9 may predispose STR calves to an increased risk of morbidity and mortality due to bovine respiratory disease.<\/jats:p>","DOI":"10.1093\/jas\/skz155","type":"journal-article","created":{"date-parts":[[2019,5,9]],"date-time":"2019-05-09T08:29:31Z","timestamp":1557390571000},"page":"2739-2749","source":"Crossref","is-referenced-by-count":10,"title":["Characterization and comparison of cell-mediated immune responses following ex vivo stimulation with viral and bacterial respiratory pathogens in stressed and unstressed beef calves1"],"prefix":"10.1093","volume":"97","author":[{"given":"Veronica M","family":"Buhler","sequence":"first","affiliation":[{"name":"Food Animal Health and Management Program, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kaycee R","family":"Cash","sequence":"additional","affiliation":[{"name":"Food Animal Health and Management Program, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David J","family":"Hurley","sequence":"additional","affiliation":[{"name":"Food Animal Health and Management Program, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brent C","family":"Credille","sequence":"additional","affiliation":[{"name":"Food Animal Health and Management Program, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2019,5,9]]},"reference":[{"key":"2019070221130822700_CIT0001","doi-asserted-by":"publisher","first-page":"215","DOI":"10.1016\/j.cvfa.2010.03.001","article-title":"Innate immunology of bovine respiratory disease","volume":"26","author":"Ackermann","year":"2010","journal-title":"Vet. 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