Endometritis clínica y subclínica en vacas lecheras en sistemas a pastoreo

Abstract

The objective of this study was to evaluate the prevalence of clinical and subclinical endometritis, and to follow up cows with subclinical endometritis from calving during days open in grazing systems. Postpartum gynecological examinations (n=479) were performed on 338 Holstein cows, primiparous and multiparous, at a dairy farm in southern Santa Fe. After the first examination, cows were distributed in three periods: 15-20, 21-28 and 29- 60 days from calving. The cows were divided into two groups: Healthy Cows (VS) and Cows with Clinical Endometritis (EC). The results showed that 48.8% were VS and 51.2% had some degree of EC, after first postpartum evaluation. A significant difference was observed with respect to the dependence between the uterine health status (VS or EC) and the postpartum period at the first evaluation (p> 0.0001). Endometrial cytology was performed in the first postpartum evaluation at 140 VS. Results showed that 25.7% had subclinical endometritis (ES), but in this case, there were no significant differences in dependence on uterine health status (VS or ES) and postpartum period. The evolution of ES was studied in 27 cows that received a second postpartum evaluation. Forty-four percentage (74%) of the cows had spontaneous recovery of their ES. On average, cows with ES decreased PMN-N values ​​at the 2nd evaluation (p> 0.0001). Our results indicate that the prevalence of EC is high in grazing dairy cows system. Cows with ES had a high percentage of spontaneous recovery before the end of the days open. This study could be used to investigate deeply this subject looking for improve the reproductive performance in grazing dairy cows.

ARK-CAICYT: http://id.caicyt.gov.ar/ark:/s26182734/1nepm1p3g