1Department of Reproduction and obstetrics, Faculty of Veterinary Medicine, University of Khartoum, Shambat, Sudan
2Department of Applied Medical Sciences, Community college, Najran University, Saudi Arabia
Abstract: This study was designed to determine the intensity of bacterial load in the uteri of postpartum (PP) dairy cows and the effects of this uterine bacterial infection on some of their reproductive traits. Six reproductive traits were evaluated. These traits were uterine involution (UI), appearance of the first dominant follicle (DF), recrudescence of the first oestrus (FO), length of the days open (DO), calving interval (CI) and the rate of service per conception (RS). Uterine endometrial swabs were collected on day 5 PP from 130 dairy cows and were cultured within 2 hours of collection onto blood agar and MacConkey agar media. The uteri of 120 cows (93%) were found infected. From the total infected cows 40 cows were used to evaluate the effect of bacterial uterine infection on their reproductive performance. Twenty cows were severely infected and the remaining cows (20 cows) were mildly infected. The result of this experiment showed that dairy cows that suffered severe uterine bacterial infection had a significantly (P<0.001) extended uterine involution period, long time for the appearance of the first DF and the FO, the length of DO and CI compared to the dairy cows that suffered mild uterine bacterial infection. Moreover, the dairy cows which suffered severe uterine bacterial infection had a significantly (P<0.001) increased rate of service per conception compared to the cows with mild uterine bacterial infection. It is concluded that, the reduced reproductive efficiency of cross-bred dairy cows in the Sudan is likely to be due to early PP uterine bacterial infection.
[Faisal Omer Ahmed, Adil Salim Elsheikh. Uterine bacterial infection during postpartum delays the recrudescence of the reproductive traits in dairy cows. J Am Sci 2013;9(6):593-598]. (ISSN: 1545-1003).http://www.jofamericanscience.org. 75
Keywords: Uterine infection, postpartum, reproductive performance, cow Full Text 75