| seminal vesiculitis and orchitis caused by brucella abortus biovar 1 in young bison bulls from south dakota. | specimens of blood, lymph nodes, spleens, and genitalia were collected at slaughter from seven 3- and 4-year-old male bison that had recently become seropositive for brucellosis. the animals were from a captive herd of approximately 3,500 bison located in central south dakota. brucella abortus biovar 1 was isolated from 2 or more specimens from each of 6 bison. severe necrotizing and pyogranulomatous orchitis was present in 1 testicle from 1 bull, and 4 animals had mild to marked seminal vesicul ... | 1997 | 9376425 |