Brucella abortus is a gram-negative zoonotic bacterium that is most frequently found in cattle. It is an intracellular bacteria, which means that it does not replicate outside the host organism. However, it can still remain alive outside of its host and is able to remain infectious in cattle feces for an average of 30 days. B. abortus causes the disease known as Brucellosis. In horses, brucellosis usually manifests as fistulous withers, poll evil, septic arthritis and vertebral osteomyelitis.
B. abortus can be disinfected with bleach, 70% ethanol, iodine/alcohol, glutaraldehyde, and formaldehyde.