[1] Inst Pasteur, Unite Biol Bacteries Pathogenes Gram Positif, F-75724 Paris 15, France
[2] CNRS, URA 2172, F-75724 Paris 15, France
[3] Inst Pasteur, Unite Interact Bacteries Cellules, F-75724 Paris 15, France
[4] INSERM, U604, F-75724 Paris 15, France
[5] INRA, USC2020, F-75724 Paris 15, France
[6] Univ Lyon, CNRS, Inst Biol & Chim Prot, Unite Mixte Rech 5086, Lyon, France
[7] Inst Pasteur, Unite Rech & Expertise Histotechnol & Pathol, F-75724 Paris 15, France