Effect of modified-live bovine viral diarrhea virus type 2 vaccine on performance, health, temperature, and behavior response in high-risk beef heifer calves

摘要

The objective of this study was to determine performance, health, vaginal temperature, and behavior differences in calves vaccinated upon feedlot arrival with a multivalent modified-live virus (MLV) vaccine which included bovine viral diarrhea virus (BVDV] type 2 antigen and calves vaccinated with a vaccine which did not include BVDV type 2. Eighty-three beef heifer calves were randomly assigned to receive a multivalent MLV vaccine containing either bovine herpesvirus-!., BVDV type 1, bovine respiratory syncytial virus, and parainfluenza type-3 virus [n = 42; 4-WAY), or a MLV vaccine of similar formulation which also contained a BVDV type 2 antigen [n = 41; 5-WAY). Performance outcomes were evaluated at 30 and 60 days. Vaginal temperatures were evaluated hourly and daily. Cattle behavior activity was monitored with a real-time location system. Calves in the 5-WAY group had greater average daily gain (P = 0.026) at 60 days, excluding dead animals, compared to 4-WAY group. Treatment group was not associated with vaginal temperature. Calves in 5-WAY spent a greater [P < 0.01) amount of time at the feed bunk on days 0, 2, 3, and 4 compared to 4-WAY. Results of this study indicate no adverse effects from administering an additional strain of BVDV type2 to high-risk heifers. Behavioral responses indicate a potential advantage to administer 5-WAY vaccine compared to 4-WAY vaccine.