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Deletion of pic results in decreased virulence for a clinical isolate of Shigella flexneri 2a from China

Junqi Zhang, Lisheng Qian, Yang Wu, Xia Cai, Xueping Li, Xunjia Cheng* and Di Qu*

BMC Microbiology 2013, 13:31  doi:10.1186/1471-2180-13-31