Anthrax is an acute infectious disease caused by the spore-forming bacterium Bacillus
anthracis. Anthrax most commonly occurs in wild and domestic lower vertebrates
(cattle, sheep, goats, camels, antelopes, and other herbivores), but it can also occur in
humans when they are exposed to infected animals or to tissue from infected animals or
when anthrax spores are used as a bioterrorist weapon.
Pictured above is the beginning stages of anthrax.