Typhus Fever Group
Typhus refers to a group of infectious diseases that are caused by different rickettsial organisms. These are of three types.
Epidemic or louse-borne typhus caused by Rickettsia prowazekii.
Relapsing louse-borne typhus or Brill–Zinsser’s disease caused by R. prowazekii.
Endemic or flea-borne murine typhus caused by Rickettsiatyphi.