1. Department of Medical Microbiology, Institute of Pathology, Faculty of Health Sciences, University of Pretoria, 0001 Pretoria, South Africa
2. Service de Bactériologie-Virologie, Hôpital de Bicêtre, Assistance Publique/Hôpitaux de Paris, Faculté de Médecine Paris-Sud, 94275 Le Kremlin-Bicêtre, France