Epidemic typhus is caused by lice. Some medical historians think that epidemic typhus caused the Great Plague of Athens in 430 B.C. Today epidemic typhus is only found in the mountains of
Brill-Zinsser disease usually occurs years after one has completely recovered from epidemic typhus. If one's immune system is weakened by something like an illness or infection of some sort, Brill-Zensser disease is prone to return to the body. Brill-Zensser disease is not as severe as epidemic typhus. Brill-Zinsser disease has the mildest symptoms of these four diseases. The symptoms of this disease include a light fever and a mild rash.
Endemic typhus is transmitted by fleas. Fleas carry bacteria called Rickettsia typhi which is the cause of endemic typhus. Endemic typhus typically only occurs in warm areas. In the
Scrub typhus is carried by mites and chiggers. Scrub typhus is caused by bacteria called Rickettsia tsutsugamushi. This disease has occurred in