[Bacterial contamination, clinical and pathohistological findings in the sex organs of cows following parturition].

Studied were a total of 119 cows of the Bulgatian Brown breed in different physiologic status at various numbers of days following parturition. Thirty-seven of the animals showed puerperal endometritis, while the remaining showed a normal course during puerperium. Uterine secretion and biopsic material for bacteriologic and histologic investigation were taken from all cows. Sixteen species of organisms were isolated from the animals with endometritis, and 12 species - from those with normal puerperium. Highest bacterial counts in both groups were found on the eighth to twelfth day, however, with the endometritis-affected cows they remained at a comparatively high level up to the 40th day after giving birth. With the cows of normal puerperium the bacterial count was found to drop abruptly after the twelfth day. No correlation was found between the bacterial and the histologic finding. Histologically, recovery processes set in by the 25th-30th day and clinically, the involution of the uterus set in by the 30th-35th day after calving.