Weight gain in feedlot cattle using enrofloxacin and several vaccines.

Abstract

For a good herd development, it is important to use vaccines and medicines to minimize some infections more frequent in confinement, such as respiratory problems. It involves animals selection, feed quality and adequate property infrastructure as well. This study aimed to evaluate weight gain in contained animals, that were submitted to the medication and metaprofilático Enrofloxacino e polivacinas. We selected 420 cattle, bulls, Nellore between 24 and 30 months of age, divided into two corrals at “Fazenda Nova”, Uberlandia, Minas Gerais. Were pre-selected 500 animals weighing between 380 and 550 kg, and selected 420 animals from the previous group, which were marked as Lot 34, placed in a corral 1 and lot 38 allocated in the corral 2. After setting batch 34 (with metafilático Enrofloxacino treatment ) and batch 38 (control), again a new division for done within each group in which three groups were formed with 70 animals in each batch, also taking into account the weight animals. The cattle were weighed on day 0, and then were weighed on days 30, 60, always taking into consideration the food and water regime. After slaughter 100% of animals’ lungs of the treated group and control group were evaluated for visualization of pathological changes visible, which could be due to lung infections. It was also performed the analysis of economic gains, compared batch / group during the experimental period. With this work we can conclude that Enrofloxacino can be used successfully as metaprofilático in confined animals, providing a reduction of respiratory diseases and increasing the weight gain of animals.