Slideshow image 1: The type of illness a person develops depends on how anthrax spores enter the body. All types of anthrax can cause death if they are not treated with antibiotics.

Slideshow image 2: Domestic and wild animals such as cattle, sheep, goats, antelope, and deer can become infected when they inhale or ingest spores in contaminated soil, plants, or water.

Slideshow image 1: Anthrax can be found naturally in soil and commonly affects domestic and wild animals around the world.

Slideshow image 4: Anthrax is thought to have originated in Egypt and Mesopotamia. Learn more about the history of naturally occuring anthrax and its use as a biological weapon.

Anthrax is a serious infectious disease caused by gram-positive, rod-shaped bacteria known as Bacillus anthracis. Although it is rare, people can get sick with anthrax if they come in contact with infected animals or contaminated animal products.