Escherichia coli O157 is an important food-borne pathogen. 39 E. coli O157 strains identified during 2014 and 2015 in retail foods in china were identified by double PCR to understand the biological characteristics of food-borne E. coli O157. The virulence genes and antimicrobial susceptibility of isolates were also detected, and the genetic diversity of Escherichia coli O157 was analyzed by Clustered Regularly Interspaced Short Palindromic Repeat(CRISPR) typing. The results showed that 8 were identified as...