Metabólitos no periparto capazes de predizer afecções uterinas puerperais em vacas mestiças leiteiras

Abstract

The aim of the study was to identify possible metabolites in the transition period able to predict the occurrence of puerperal uterine diseases in dairy crossbred cows Holstein x Gir. The hypothesis was that, similar to what has been observed in Holstein cows, the negative energy balance (NEB), expressed by the increase in NEFA and BHBA would increase the incidence of uterine diseases. 34 lactating cows with breed composition of crossbred cows (%HG, %HG, 5/8HG and %HG) were used. Evaluated moments were established as prepartum (-60 and -30), calving and postpartum period (+14, +21 and +35) and cows divided into two groups with and without uterine diseases (retained placenta, metritis, clinical endometritis and cytological endometritis. NEB was based on non-esterified fatty acids (NEFA) and beta-hydroxybutyrate (BHBA) concentration sat calving and 14 days postpartum. It was observed that about 1/3 of crossbred cows had been with BEN, which was characterized by a significant increase in NEFA without increasing BHBA, but less intense than observed in specialized Holstein cows during transition period. There was a significant difference between cows with and without uterine diseases in NEFA and calcium concentrations, as well as body condition during prepartum. It was concluded that the BCS in prepartum period and serum NEFA and calcium concentration sat partum are considered risk factors for the occurrence of uterine diseases. It was concluded that loss of BCS, followed by NEFA increase and decrease of calcium levels around partum, are correlated with the increase in the occurrence of uterine diseases.