Effect of Vaccination Against Ibr/Bvd on The Reproductive Performances of Brava Dos Açores -A Bovine Lidia Breed | Biomedgrid

From February 2012 to March 2018, 94 females aged more than 24 months were randomly divided in two groups in which 43 were vaccinated and considered the experimental group and 51 were not vaccinated and used as control. For the characterization of the reproductive indexes, reproductive registers made by the animal's owners as well as data obtained through the sanitary visits and reproductive consulting of our team allow to determine the follow parameters: number of parturitions; the mean age at first calving; calving to calving interval and calving to conception interval. The first service conception rate, heat intervals as well as the percentage of cows pregnant at first pregnancy diagnosis examination was also recorded. Data obtained from all animals clearly demonstrated that all parameters studied were better in the vaccinated group when compared to unvaccinated animals. The results where the benefits were most pronounced were in the calving to calving interval, where values decreased from 889 ± 25 to 471 ± 35 days respectively to unvaccinated and vaccinated females. This great improvement led that the real fertility raised from 28.6% of the unvaccinated group to 71.1% for the vaccinated group.