Houda Gharsallah, Olfa Frikha-Gargouri, Hanen Sellami, Fatma Besbes, Abir Znazen and Adnene Hammami*
* Corresponding author: Adnene Hammami adnene.hammami@rns.tn
BMC Infectious Diseases 2012, 12:333 doi:10.1186/1471-2334-12-333