Evaluation of the stress-reducing effect of trace mineral injection in beef calves

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dc.contributor.authorMegahed, Ameer A.en
dc.contributor.authorBittar, Joao H. J.en
dc.contributor.authorPalomares, Roberto A.en
dc.contributor.authorMercadante, Vitor R. G.en
dc.contributor.authorDias, Nicholas W.en
dc.date.accessioned2023-08-08T12:59:10Zen
dc.date.available2023-08-08T12:59:10Zen
dc.date.issued2023-04en
dc.description.abstractBackground: Little is known about the effects of trace mineral supplementation on the stress response in beef calves. Objectives: To investigate the effect of injectable trace mineral supplementation (ITM) on the stress response in beef calves exposed to different types of stress. Animals: Thirty weaned Angus and Angus crossbred calves. Methods: The enrolled calves were randomly assigned to 2 groups: ITM, 15 calves received modified-live virus vaccine (MLV) and ITM SC and 15 calves received MLV and saline SC (CONT). The calves were exposed to 3 types of stress: the stress of MLV vaccination (d0), nasal aerosol with bovine viral diarrhea virus-2 (BVDV-2) challenge (d5), and liver biopsy (d26). The calves' body weights and health status were monitored. Leukocyte counts, serum cortisol concentration ([cort]), BVDV-2 serum neutralizing antibodies (SNA), and percentages of CD4(+), CD8(+), WC1(,)(+) and CD25(+) T-lymphocytes were measured. Results: Serum cortisol concentration ([cort]) showed strong associations with the percentage of CD8(+) (r(s) = .50), BVDV2-SNA (r(s) = -.43), and WC1CD25(+) (r(s) = .41) cells, and rectal temperature (r(s) = .40). The highest [cort] was reported 3 days after aerosol BVDV-2 challenge. Serum [cort] was decreased in ITM-treated calves 3 days post-BVDV-2 challenge, compared with CONT calves, with an average decrease of 18.5 ng/mu L (95% confidence interval [CI], -6.07 to -31.3). The ITM-treated calves were heavier and healthier (P < .01) than the CONT calves. Conclusions and Clinical Importance: Trace mineral supplementation appears to have stress mitigation effects in beef cattle that may reflect positively on growth and health performance. Viral exposure is associated with a high degree of stress, which is considered a major welfare concern.en
dc.description.notesCollege of Veterinary Medicine, University of Georgia; Multimin USA, Inc; College of Veterinary Medicine, University of Florida; Boehringer Ingelheim Vetmedica Inc.en
dc.description.sponsorshipCollege of Veterinary Medicine, University of Georgia; Multimin USA, Inc; College of Veterinary Medicine, University of Florida; Boehringer Ingelheim Vetmedica Inc.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1111/jvim.16721en
dc.identifier.eissn1939-1676en
dc.identifier.issn0891-6640en
dc.identifier.pmid37186325en
dc.identifier.urihttp://hdl.handle.net/10919/116002en
dc.language.isoenen
dc.publisherWileyen
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectbeef calvesen
dc.subjectbovine viral diarrheaen
dc.subjectcortisolen
dc.subjectstressen
dc.subjecttrace mineralsen
dc.titleEvaluation of the stress-reducing effect of trace mineral injection in beef calvesen
dc.title.serialJournal of Veterinary Internal Medicineen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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