1. French Agency for Food, Environmental, and Occupational Health & Safety [L'Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement, et du Travail/ANSES], Maisons-Alfort Laboratory for Food Safety, Bacterial Characterization and Epidemiology Unit, European Union Reference Laboratory for Listeria monocytogenes, Maisons-Alfort Cedex, France.