Department of Diarrheal Diseases;
National Institute of Communicable Diseases Prevention and Control;
Chinese Center for Disease Control and Prevention;
Priority Laboratory of Molecular Medical Bacteriology;
Ministry of Health;
Beijing 102206;
China;
Laboratoire de Chimie Bactérienne;
UPR9043;
IBSM;
CNRS;
F-13402 Marseille cedex 20;
France;