Fitness -, virulence - associated genome regions, and CRISPR / CAS (clustered regularly interspaced
short palindromic repeats / CRISPR associated
sequence) arrays of these STEC O156: H25 and O182: H25
isolates were highly similar, and identical genomic integration sites for the stx converting bacteriophages and the core LEE, identical Shiga toxin converting bacteriophage genes for stx1a, identical complete LEE loci, and identical sets of chemotaxis and flagellar genes were identified.