1. Dipartimento di Genetica e Microbiologia, Università di Bari, Via G. Amendola 165/A, 70126 Bari, Italy
2. Interuniversity Research Center for Sustainable Development, Università “La Sapienza,” Palazzo Doria Pamphilj, 00038 Valmontone, Roma, Italy
3. African Medical and Research Foundation (AMREF), P.O. Box 30125, Nairobi, Kenya
4. Unité de Biodiversité des Bactéries Pathogènes Emergentes, Institut Pasteur, 75724 Paris Cedex 15, France