Anthrax, a disease of mammals and humans, is caused by a spore-forming bacterium called Bacillus anthracis. Anthrax is a naturally occurring disease with worldwide distribution. It is a zoonotic disease, meaning it may spread from animals to humans. All mammals appear to be susceptible to anthrax to some degree, but ruminants such as cattle, sheep, and goats are the most susceptible and commonly affected, followed by horses, and then swine.
Anthrax is a reportable disease. Report any confirmed or suspected case to: MT State Veterinarian 406-444-2043 and MT USDA APHIS Veterinary Services 406-449-2220.