Efeito da vacina autógena de mastite no desempenho produtivo e reprodutivo de vacas leiteiras mestiças

Abstract

In Dairy farming it is essential that the system is well managed in order to reduce the challenges, which interfere in the productivity and economic return of the system. However, not all challenges are easy to manage, a good example of that difficulty is mastitis, which generates many losses and its control demands commitment to the best practices, and therefore vaccination can be an alternative do reduce the severity e losses due to the disease. The goal was compare the productivity and reproductivity performance of crossbred dairy cows after the use of autogenous vaccine against mastitis. Were evaluated 104 cows in lactation, dry, over 5 months pregnant heifers, before and after the vaccine protocol. The evaluated parameters were milk production, the somatic cell count (SCC), days of lactation, and the conception rate (CCR), performing a descriptive analysis of all the variables. A significant decrease of 49,92% in the average of SCC was detected between the months of September, October and November of 2022, when compared to the same period of 2021. Starting in may of 2022 it was noted a decrease in SCC average followed by a increase of the milk production in the following months. However in reproduction, there was no difference in the CCR before and after the use of the vaccine between the examined years. Therefore the herd average days of lactation increased, probably because of the small reduction of the CCR in 2022.It was concluded that there was an increase in milk production and a reduction in SCC, but the use of the autogenous vaccine did not interfere with the reproductive rates of the herd.