Amandine Gagneux-Brunon1, Frédéric Lucht2, Elisabeth Botelho-Nevers2. 1. Department of Infectious and Tropical Diseases, University Hospital of Saint-Etienne, France; CIC1408-Inserm, France; Groupe Immunité des Muqueuses et Agents Pathogènes, EA 3064, University of Lyon, Saint-Etienne, France. Electronic address: amandine.gagneux-brunon@chu-st-etienne.fr. 2. Department of Infectious and Tropical Diseases, University Hospital of Saint-Etienne, France; CIC1408-Inserm, France; Groupe Immunité des Muqueuses et Agents Pathogènes, EA 3064, University of Lyon, Saint-Etienne, France.