{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T22:13:33Z","timestamp":1781129613306,"version":"3.54.1"},"reference-count":48,"publisher":"Oxford University Press (OUP)","issue":"11","license":[{"start":{"date-parts":[[2021,10,21]],"date-time":"2021-10-21T00:00:00Z","timestamp":1634774400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Diamond V Mills Inc."}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>We have previously reported that supplementation with Saccharomyces cerevisiae fermentation products (SCFP) ameliorates clinical signs and lung pathology following experimental bovine respiratory syncytial virus (BRSV) infection in preweaned dairy calves. The objectives of this study were to determine the effect of SCFP supplementation on the metabolic and endocrine responses, and disease outcome of a viral\u2013bacterial coinfection in preweaned calves. Twenty-seven, 1- to 2-d-old Holstein-Angus cross calves were enrolled in the study; one SCFP calf was removed from the trial during the pre-challenge phase due to complications from nephritis. Calves were assigned to two treatment groups: control or SCFP-treated, base milk replacer with 1 g\/d SCFP (Smartcare, soluble formula) and calf starter top dressed with 5 g\/d SCFP (NutriTek, insoluble formula). Calves were infected with BRSV on day 21, followed 6 d later by intratracheal inoculation with Pasteurella multocida (PM). Calves were euthanized on day 10 post-viral infection. Calves receiving SCFP had reduced thoracic ultrasonography scores on day 7 post-viral infection (P = 0.03) and a tendency toward reduced scores on day 10 post-viral infection (P = 0.09). Calves receiving SCFP also had less severe lung pathology scores at necropsy (P = 0.06). No differences between treatments were observed in lung viral loads (P = 0.48) or bacterial lung recovery (P = 0.34); however, there was a distinction in the lung location for PM recovery, with PM isolated more frequently from the cranial lobes in SCFP-treated calves, but more frequently from the caudal lobes of control calves. Calves treated with SCFP tended (P = 0.07) to have higher serum IL-6 concentrations following the coinfection. Calves treated with SCFP had lower concentrations of serum nonesterified fatty acids and beta-hydroxybutyric acid compared with controls following experimental challenge (P = 0.03 and P = 0.08, respectively), suggesting metabolic changes favoring growth and development. There were no differences between groups in gene expression of insulin receptor, insulin-like growth factor 1 (IGF-1), IGF-1 receptor (IGF-1R), growth hormone receptor, or haptoglobin in the liver. Results from this study suggest that supplementing with SCFP may moderate the impact of a respiratory viral\u2013bacterial coinfection on preweaned calves through metabolic and immune modifications.<\/jats:p>","DOI":"10.1093\/jas\/skab300","type":"journal-article","created":{"date-parts":[[2021,10,21]],"date-time":"2021-10-21T18:44:33Z","timestamp":1634841873000},"source":"Crossref","is-referenced-by-count":14,"title":["Feeding<i>Saccharomyces cerevisiae<\/i>fermentation products lessens the severity of a viral\u2013bacterial coinfection in preweaned calves"],"prefix":"10.1093","volume":"99","author":[{"given":"Paiton O","family":"McDonald","sequence":"first","affiliation":[{"name":"Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA 50010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Courtney","family":"Schill","sequence":"additional","affiliation":[{"name":"Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA 50010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Teresia W","family":"Maina","sequence":"additional","affiliation":[{"name":"Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA 50010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Beulah","family":"Samuel","sequence":"additional","affiliation":[{"name":"Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA 50010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Madison","family":"Porter","sequence":"additional","affiliation":[{"name":"Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA 50010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ilkyu","family":"Yoon","sequence":"additional","affiliation":[{"name":"Diamond V Mills Inc., Cedar Rapids, IA 52404, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jodi L","family":"McGill","sequence":"additional","affiliation":[{"name":"Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA 50010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2021,10,21]]},"reference":[{"key":"2021111803473180800_CIT0001","doi-asserted-by":"crossref","first-page":"1189","DOI":"10.3168\/jds.2016-11399","article-title":"Effects of Saccharomyces cerevisiae fermentation products on dairy calves: performance and health","volume":"100","author":"Alugongo","year":"2017","journal-title":"J. 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