A female genital disease in cattle associated with Ureaplasma diversum.
A disease characterized by mucopurulent vaginal discharge occurred in grazing cattle in Shizuoka Prefecture in 1987. The vaginal discharge appeared 4-10 days after mating and disappeared about one month after the onset of symptoms. The morbidity rate ranged from 10% to 40% and the herd conception rate was 80%. Bacteriological examination of the vaginal discharge from 10 cows yielded Ureaplasma diversum in pure culture from all the cows and Haemophilus somnus from four cows. Vaginal swabs from 26 clinically normal, mated cows yielded U. diversum from 12 cows whereas U. diversum was isolated from all the 17 diseased cows examined. H. somnus was isolated from the cervicovaginal mucus from 10 of 42 healthy cows and from 12 of 33 diseased cows. Both H. somnus and U. diversum were also isolated from 5% and 30%, respectively, of the cervicovaginal swabs from unmated cows. There was no relationship between the incidence of the disorder and the serotype groups of U. diversum.