Arbres
phylogénétiques des Rickettsiae :


( Zhang JZ, Fan MY, Wu MY, Fournier PE, Roux V, Raoult D. Genetic classification
of "Rickettsia heilongjiangii" and "Rickettsia hulinii",
two chinese spotted fever group Rickettsiae. J Clin Microbiol. 2000 ;
38 (9) :3498 - 3501. http://jcm.asm.org/content/vol38/issue9/images/large/jm0900089002.jpeg)