Perfil Metabólico e Proteínas de Fase Aguda em Bezerras Suplementadas com Saccharomyces cerevisiae e Metabólitos de Fermentação de Levedura Hidrolisada em Diferentes Sistemas de Criação

Abstract

Nutrition of calves in the stage from birth to weaning is closely related to the development and function of the immune system. Therefore, the objective of this study was to evaluate the effect of supplementation with Saccharomyces cerevisiae and hydrolyzed yeast fermentation metabolites on the clinical biochemical profile of dairy heifers during the neonatal period in different breeding systems and to analyze whether supplementation influenced the neonate's metabolism during Diarrhea. The study was developed out in a commercial dairy farm in the city of Rio Grande / RS, using 48 healthy one-day-old Holstein heifers. The heifers were housed in different systems and divided into four groups: Baia Yeast (n = 14), Control Baia (n = 16), Yeast Stake (n = 8) and Control Stake (n = 10). Yeast groups received 8 ml / day for 42 days of Saccharomyces cerevisiae and hydrolysed yeast metabolites. Blood samples were collected by puncture of the jugular vein on days 1, 7 and 14 after birth to analyze the biochemical profile. In this study, supplementation with S. cerevisiae and hydrolyzed yeast fermentation metabolites had no effect on the clinical biochemical profile in dairy heifers during the neonatal period, but a difference was observed in some metabolites in relation to the calf rearing system, where animals were found to have lower concentrations of albumin and paraoxonase, indicating a higher susceptibility to infectious diseases, as well as a lower value of total calcium, phosphorus and magnesium. The bred animals were able to keep their animals closer to the reference values, which shows a better breeding efficiency of these animals in this type of environment.