HISTORY (I)
1935: canine fatal hemorrhagic illness : (Rickettsia canis : Pasteur Institute, Algeria)
1945: Rickettsia canis renamed Ehrlichia canis (Moshovski)
1955 (Japon): Ehrlichia sennetsu: 1st human ehrlichioses (Misao et al.)
1986 (USA): 1st human ehrlichioses in the Western hemisphere (Meada et al.)