Xiumei Hu, Banglao Xu, Yinmei Yang, Dayu Liu, Mengjie Yang, Ji Wang, Hongwei Shen, Xiaomian Zhou* and Xuejun Ma*
* Corresponding authors: Xiaomian Zhou zhouxmphd@163.com - Xuejun Ma maxj@ivdc.chinacdc.cn
BMC Microbiology 2013, 13:58 doi:10.1186/1471-2180-13-58