1. Université Paris-Est, Anses, Maisons-Alfort Laboratory for Food Safety, European Union Reference Laboratory for Listeria monocytogenes, Bacterial Characterisation and Epidemiology Unit, Maisons-Alfort cedex, France.
2. Food- and Waterborne Diseases and Zoonoses Programme, European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden.
3. Université Paris-Est, Anses, Maisons-Alfort Laboratory for Food Safety, European Union Reference Laboratory for Listeria monocytogenes, Maisons-Alfort cedex, France.