In the article by Xiao-Bo Liu et al. that appears in the Journal of Microbiology 2012; 50, 1024-1028, the author name order should be changed as ‘Wei Luo, Xiao-Bo Liu, Qiu-Ya Gu, and Xiao-Bin Yu*’ and Dr. Wei Luo and Dr. Xiao-Bo Liu contributed equally to this work.