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 vesiculitis. Immunohistochemical staining labeled organisms in seminal vesicles and the testicle with orchitis. Ultrastructurally, intact bacilli were present in cytoplasmic vacuoles of some macrophages; other macrophages contained intracytoplasmic aggregates of calcified coccobacilli.
Rhyan
J C
JC
Pathobiology Laboratory, U.S. Department of Agriculture, Ames, IA 50010, USA.
Holland
S D
SD
Gidlewski
T
T
Saari
D A
DA
Jensen
A E
AE
Ewalt
D R
DR
Hennager
S G
SG
Olsen
S C
SC
Cheville
N F
NF
D000038:Abscess / Q000382:microbiology / Q000473:pathology / Q000662:veterinary; D000818:Animals; D000942:Antigens, Bacterial / Q000032:analysis; D016164:Bison; D002003:Brucella abortus / Q000302:isolation & purification; D002006:Brucellosis / Q000150:complications / Q000473:pathology / Q000662:veterinary*; D005832:Genital Diseases, Male / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D007124:Immunoenzyme Techniques; D008264:Macrophages / Q000382:microbiology / Q000473:pathology / Q000648:ultrastructure; D008297:Male; D009920:Orchitis / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D012669:Seminal Vesicles / Q000382:microbiology / Q000473:pathology*; D013023:South Dakota; D013737:Testis / Q000382:microbiology / Q000473:pathology
D000942:Antigens, Bacterial