Bacillus anthracis is a Gram-positive, rod-shaped bacterium that is the sole cause of anthrax, a severe infectious disease affecting both humans and animals. It is distinguished by its unique ability to form highly resilient spores, allowing it to survive in the environment for decades. Historically significant, it was the first pathogen ever characterized and the subject of one of the first vaccines developed. Biological Profile and Life Cycle B. anthracis exists in two distinct forms: About Anthrax - CDC
The Persistent Pathogen: A Comprehensive Look at Bacillus anthracis anthrax bacillus