Typhus, also known as typhus fever, is a group of infectious diseases that include epidemic typhus, scrub typhus, and murine typhus. Common symptoms such as fever, headache, and a rash typically begin one to two weeks after exposure.
The diseases are caused by specific types of bacterial infection. Epidemic typhus is caused by Rickettsia prowazekii spread by body lice, scrub typhus is caused by Orientia tsutsugamushi spread by chiggers, and murine typhus is caused by Rickettsia typhi spread by fleas.