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

Authors

  • 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

DOI:

https://doi.org/10.21423/bovine-vol52no1p53-58

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.

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Published

2018-02-01

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Section

Articles

How to Cite

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. (2018). The Bovine Practitioner, 52(1), 53-58. https://doi.org/10.21423/bovine-vol52no1p53-58

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