1 Université de Paris, Paris, France; Department of Infectious Diseases and Tropical Medicine, Paris Centre Hospital, AP-HP, Paris, France; Biology of Infection Unit, Institut Pasteur, Paris, France; Institut Pasteur, French National Reference Center and WHO Collaborating Center Listeria, Paris, France; Inserm U1117, Paris, France.
2 Université de Paris, Paris, France; Department of Infectious Diseases and Tropical Medicine, Paris Centre Hospital, AP-HP, Paris, France. Electronic address: etienne.canoui@aphp.fr.