2012•Applied and Environmental MicrobiologyOpen access

Dual-Serotype Biofilm Formation by Shiga Toxin-Producing Escherichia coli O157:H7 and O26:H11 Strains

Rong Wang, Norasak Kalchayanand, James L. Bono, J. W. Schmidt, Joseph M. Bosilevac

Abstract

Escherichia coli O26:H11 strains were able to outgrow O157:H7 companion strains in planktonic and biofilm phases and also to effectively compete with precolonized O157:H7 cells to establish themselves in mixed biofilms. E. coli O157:H7 strains were unable to displace preformed O26:H11 biofilms. Therefore, E. coli O26:H11 remains a potential risk in food safety.

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Key concepts: Escherichia coli, Microbiology, Biofilm, Serotype, Shiga toxin, Biology, Shiga-like toxin, Enterobacteriaceae