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Article
Evaluation of Response to Bovine Viral Diarrhea Virus Type 2 Vaccination and Timing of Weaning on Yearling Ultrasound Body Composition, Performance, and Carcass Quality Traits in Angus Calves
Journal of Animal Science
  • Richard G. Tait, Jr., Iowa State University
  • Erika Diane Downey, United States Department of Agriculture
  • Mary S. Mayes, Iowa State Unviersity
  • Carissa A. Park, Iowa State University
  • Julia Ridpath, United States Department of Agriculture
  • Dorian J. Garrick, Iowa State University
  • James M Reecy, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-2013
DOI
10.2527/jas.2012-5891
Abstract
There are concerns about antagonisms between immunity and animal productivity in livestock production. The objective of this study was to evaluate the effect of antibody levels through a response to vaccination protocol, weaning timing, and their interaction on performance and carcass quality traits in Angus beef cattle. Final antibody level and response to vaccination were based on neutralizing serum antibodies against bovine viral diarrhea virus type 2 (BVDV2). Calves were followed through development and the feedlot phase, with collection of yearling ultrasound (n = 957), preharvest (n = 762), and carcass (n= 673) data. In this study, 48% of the animals were observed to have positively responded to the vaccine, as evidenced by higher final antibody levels compared to prevaccination antibody levels. Increased final antibody levels were significantly (P < 0.05) associated with increased yearling weight and increased subcutaneous fat over the rump. An interaction between final antibody level and weaning time also was associated (P < 0.05) with Warner-Bratzler shear force (WBSF) and meat pH, with a favorable, negative relationship between final antibody and WBSF in calves weaned at initial vaccination. Overall antibody response by wean time interaction had a significant (P < 0.05) association with ADG and meat pH, with calves weaned at initial vaccination having a favorable, positive relationship between overall antibody response and ADG. Under both the final antibody and overall antibody response models, animals weaned at initial vaccination had significantly (P < 0.05) lower intramuscular fat at yearling time and conversely higher harvest weight than animals weaned at the booster vaccination. When antibody response was grouped (none, low, high), a significant interaction (P < 0.05) between antibody response group and weaning time was identified for ADG, harvest weight, and HCW. Animals weaned at the initial vaccination in the high antibody response group had the advantage for ADG, harvest weight, and HCW compared to animals in the high-response group that were weaned at booster vaccination. Linear increases in antibody response generally did not have negative effects on performance or carcass quality traits in finished cattle (P > 0.05). Therefore, producers should not be concerned about decreased production or quality attributes as a result of developing a robust antibody response to vaccination for BVDV2 in beef cattle.
Comments

This article is from Journal of Animal Science 91 (2013): 5466, doi:10.2527/jas.2012-5891.

Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Citation Information
Richard G. Tait, Erika Diane Downey, Mary S. Mayes, Carissa A. Park, et al.. "Evaluation of Response to Bovine Viral Diarrhea Virus Type 2 Vaccination and Timing of Weaning on Yearling Ultrasound Body Composition, Performance, and Carcass Quality Traits in Angus Calves" Journal of Animal Science Vol. 91 Iss. 11 (2013) p. 5466 - 5476
Available at: http://works.bepress.com/james_reecy/79/