1. Laboratory of Epidemiology and Veterinary Microbiology, Group of Bacteriology and Biotechnology, Pasteur Institute of Tunisia (IPT), University of Tunis El Manar (UTM), Tunis, Tunisia
2. Univ. Bourgogne Franche-Comté, AgroSup Dijon, Dijon, France
3. Laboratory of Animal Resources and Food, National Institute of Agronomy, Tunis, Tunisia