Influência de infecções uterinas e mastite nos índices reprodutivos de vacas leiteiras cruzadas GIR X Holandês no periparto

Abstract

Uterine infections and mastitis are affections that have in common the invasion and growth of microorganisms during the course of the disease, making it difficult to resolve and leading to both reproductive and production losses. This study proposed to verify the influence of uterine infections and mastitis on the reproductive indexes: time for uterine involution; return to cyclic luteal ovarian activity (RAOLC); numbers of artificial inseminations (AI) and pregnancy rate in primiparous and multiparous dairy cows. Fifty-five crossbred Gir x Holstein dairy cows of reproductive age, grouped according to the category in Primiparous (n = 20) and Multiparous (n = 35) were used and distributed into four groups according to the diagnosis of affections as healthy; with uterine infections; with mastitis; and with the two concomitant affections (uterine infection and mastitis). Females were evaluated at intervals of 15 days, from 15 days postpartum (dpp), to 90 dpp, by means of physical, gynecological and CMT tests. Mann-Whitney tests were performed to compare the different categories at different times and groups of affections, and to verify the influence of affections on the reproductive indexes, the Spearman correlation coefficient was calculated, all at a significance level of 5% (p <0.05). There was no influence of the presence of uterine infections and mastitis in the reproductive indexes in multiparous cows. There was no influence of the presence of uterine infections and mastitis in the reproductive indexes in multiparous cows. The presence of mastitis and the two concomitant conditions delayed the return to cyclic luteal ovarian activity in primiparous cows (p = 0.04 and 0.02, respectively). It was observed that 83.54% (46/55) cows had RAOLC up to 90 dpp. Twenty inseminations were performed on 15 cows (3 P and 12 M). The pregnancy rate in the study was 28.3% (13/46). It was concluded that the presence of uterine infections and mastitis did not influence the reproductive indexes