Anthrax (Greek Άνθραξ for coal) is an acute disease in humans and animals that is caused by the bacterium Bacillus anthracis and is highly lethal in some forms. Anthrax is one of only a few bacteria that can form long-lived spores. When the...

Saint Anthony's fire (also known historically as Ignis Sacer and Holy Fire) may refer to one of several infectious diseases:

St Anthony's Fire (Doctor Who)

Ergotism (this meaning particularly common in France and Germany)

Erysipelas (this meaning particularly common in England and the United States)

Herpes zoster (this meaning particularly common in Italy and Malta)