Gilles Raguin1, Serge Eholié2. 1. Department of Infectious and Tropical Diseases, Hôpital Saint Antoine, Assistance publique-Hôpitaux de Paris, Paris, France; groupement d'intérêt public ESTHER, Paris, France. Electronic address: gilles.raguin@esther.fr. 2. Department of Infectious and Tropical Diseases, CHU de Treichville, Abidjan, Côte d'Ivoire.