EN
Trial to infect bulls using Ureaplasma diversum culture (U) showed that this microorganisms regularly colonizes mucosal membranes of the urethra and preputial sac. More distal parts of the urogenital tract are colonized accidentally or the concentration of ureaplasms is low and therefore, it is difficult to detect ureaplasms. Appearance in 8 out of 12 infected bulls clinical signs of granular balanoposthitis (balanoposthitis granularis latin) poits to the role of U. diversum in etiology of this disease. Because this isolate of U. diversum caused also in cows granular vulvovaginitis (vulvovaginitis granularis latin) it was assumed that these two forms reflect one disease.