Yosra Ayed, Afef Dellai, Hedi B Mansour, Hassen Bacha* and Salwa Abid
* Corresponding author: Hassen Bacha hassen-bacha@fmdm.rnu.tn
Annals of Clinical Microbiology and Antimicrobials 2012, 11:15 doi:10.1186/1476-0711-11-15