[1] Inst Pasteur, Unite Biodivers Bacteries Pathogenes Emergentes, Ctr Natl Reference Salmonella, INSERM U389, F-75724 Paris, France
[2] Agence Francaise Secur Sanitaire Aliments, Unite Caracterisat & Epidemiol Bacterienne, Maisons Alfort, France
[3] INRA, Unite BioAgresseurs Sante & Environm, F-37380 Nouzilly, France