Influence of vaccination with a combined chemically altered/inactivated BHV-1/BVD vaccine or a modified- live BHV-1/BVD vaccine on reproductive performance in beef cows and heifers

  • George A. Perry Department of Animal Science, South Dakota State University, Brookings, SD 57007
  • Thomas W. Geary USDA-ARS, Fort Keogh Livestock Range and Research Station, Miles City, MT 59301
  • Julie A. Walker Department of Animal Science, South Dakota State University, Brookings, SD 57007
  • Jerica J. J. Rich Department of Animal Science, South Dakota State University, Brookings, SD 57007
  • Emmalee J. Northrop Department of Animal Science, South Dakota State University, Brookings, SD 57007
  • Stephanie D. Perkins Department of Animal Science, South Dakota State University, Brookings, SD 57007
  • Christina L. Mogck Department of Animal Science, South Dakota State University, Brookings, SD 57007
  • Megan L. Van Emon Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717
  • Abby L. Zezeski USDA-ARS, Fort Keogh Livestock Range and Research Station, Miles City, MT 59301
  • Russell F. Daly Department of Veterinary and Biomedical Sciences, South Dakota State University, Brookings, SD 57007
Keywords: modified-live, inactivated, vaccine, reproduction, conception rates

Abstract

A field trial was conducted on 10 herds of previously- vaccinated cows and heifers (n=1,567) to evaluate the reproductive effects of prebreeding vaccination with either a modified-live virus (MLV) or a chemically altered/inactivated (CA/IV] BHV-1/BVDV vaccine. Animals received a single (cows) or 2 injections (heifers) of either vaccine, with the final injection between 27 and 89 days before breeding, which consisted of timed AI following a 7-d CO-Synch + CIDR synchronization. Conception rates to AI were greater in the CA/IV vaccine group compared to the MLV vaccine group (P=0.05; 60% vs 52%). Interval from vaccination with either vaccine until AI also influenced conception rates (P=0.02), with animals vaccinated 27 to 29 (52%) days or 30 to 37 (52%) days prebreeding exhibiting decreased conception rates compared to animals vaccinated 46 to 89 days prebreeding (P<0.03; 64%). There was no treatment by interval interaction (P=0.79), effect of treatment (P=0.18), or treatment by interval interaction (P=0.17) on breeding season pregnancy rates. In summary, vaccination of previously vaccinated beef cows and heifers with a MLV vaccine pre-breeding (27 to 89 d) was associated with decreased AI conception rates compared to a CA/IV vaccine.

Published
2018-02-01
How to Cite
Perry, G. A., Geary, T. W., Walker, J. A., Rich, J. J. J., Northrop, E. J., Perkins, S. D., Mogck, C. L., Van Emon, M. L., Zezeski, A. L., & Daly, R. F. (2018). Influence of vaccination with a combined chemically altered/inactivated BHV-1/BVD vaccine or a modified- live BHV-1/BVD vaccine on reproductive performance in beef cows and heifers. The Bovine Practitioner, 52(1), 53-58. https://doi.org/10.21423/bovine-vol52no1p53-58
Section
Articles

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