1 Institut Pasteur, French National Reference Center and WHO Collaborating Center for Listeria, Paris, France; Department of Infectious Diseases and Tropical Medicine, Université de Paris, Necker-Enfants Malades University Hospital, AP-HP, Paris, France; Biology of Infection Unit, Unité de Biologie des Infections, Institut Pasteur, 28 rue du Dr Roux, Paris 75015, France.
2 Institut Pasteur, French National Reference Center and WHO Collaborating Center for Listeria, Paris, France; Department of Infectious Diseases and Tropical Medicine, Université de Paris, Necker-Enfants Malades University Hospital, AP-HP, Paris, France.
3 Institut Pasteur, French National Reference Center and WHO Collaborating Center for Listeria, Paris, France; Department of Infectious Diseases and Tropical Medicine, Université de Paris, Necker-Enfants Malades University Hospital, AP-HP, Paris, France; Inserm U1117, Paris, France.
4 Department of Infectious Diseases and Tropical Medicine, Université de Paris, Necker-Enfants Malades University Hospital, AP-HP, Paris, France.
5 Institut Pasteur, French National Reference Center and WHO Collaborating Center for Listeria, Paris, France; Department of Infectious Diseases and Tropical Medicine, Université de Paris, Necker-Enfants Malades University Hospital, AP-HP, Paris, France; Biology of Infection Unit, Unité de Biologie des Infections, Institut Pasteur, 28 rue du Dr Roux, Paris 75015, France; Inserm U1117, Paris, France. Electronic address: marc.lecuit@pasteur.fr.
6 Institut Pasteur, French National Reference Center and WHO Collaborating Center for Listeria, Paris, France; Department of Infectious Diseases and Tropical Medicine, Université de Paris, Necker-Enfants Malades University Hospital, AP-HP, Paris, France; Biology of Infection Unit, Unité de Biologie des Infections, Institut Pasteur, 28 rue du Dr Roux, Paris 75015, France; Inserm U1117, Paris, France. Electronic address: caroline.charlier@pasteur.fr.