Association of nucleotide polymorphisms within the O-antigen gene cluster of Escherichia coli O26, O45, O103, O111, O121, and O145 with serogroups and genetic subtypes.
Norman KN, Strockbine NA, Bono JL. Appl Environ Microbiol. 2012 Sep; 78(18):6689-703. Epub 2012 Jul 13.