Diseases mainly caused by contact between herbivores and natural spores. Humans are infected by touching sick animals and their products or eating the meat of sick animals. Bacillus anthracis invades from the skin, causing skin anthrax, causing skin necrosis to form eschar ulcer and surrounding swelling and toxemia, and can also cause pulmonary anthrax or intestinal anthrax, all of which can be complicated with sepsis. Anthrax is distributed all over the world, especially in temperate regions and areas with poor sanitary conditions. At present, the incidence of human anthrax has obviously decreased, but anthrax spores are highly toxic, easy to obtain, easy to preserve, with great potential, low visibility and easy to spread, and have been used as biological weapons and terrorist acts in some countries.