MSD Manual

Please confirm that you are a health care professional

honeypot link
Professional Version

Brucellosis in Horses


Paul Nicoletti

, DVM, MS, DACVPM (Deceased), College of Veterinary Medicine, University of Florida

Last review/revision Jul 2013 | Modified Oct 2022

Horses can be infected with Brucella abortus or B suis. Suppurative bursitis, most commonly recognized as fistulous withers or poll evil ( see Fistulous Withers and Poll Evil Fistulous Withers and Poll Evil Bursitis is an inflammatory reaction within a bursa. The causes can range from overuse, mild trauma, or severe trauma to sepsis. Bursitis in its various forms is more common and a more important... read more Fistulous Withers and Poll Evil ), is the most common condition associated with brucellosis in horses. Occasionally, abortion has been reported. It is unlikely that infected horses are a source of the disease for other horses, other animal species, or people. Brucellosis in horses is very rare in the USA because of elimination of the disease in cattle.

quiz link

Test your knowledge

Take a Quiz!