Analyses of the virulence genes, O-serogroups, ERIC-types and phylogenetic background data, in relation to each other, showed that our O113 strains contain important stx2 subtypes including stx2a, stx2c and stx2d; this finding is similar to the reports from HUS cases, caused by stx2+/O113 strains [42] and healthy cattle [14] in some parts of the world. Here, STX2 is linked to hemolytic-uremic syndrome.