[1] Univ Mediterranee, Fac Med, CNRS, UMR 6020,Unite Rickettsies, F-13385 Marseille 05, France
[2] Hosp Concept, Serv Hepatogastroenterol, Marseille, France
[3] Fac Med, Histol Lab, Marseille, France
[4] Hop Necker Enfants Malad, Microbiol Serv, Paris, France