stx1a+stx2c+eae-γ1 and stx1a+eae-β3 were more prevalent in non-HUS-associated strains (p < 0.0001and p = 0.0245), while stx2a+eae-γ1 was significantly associated with HUS (p < 0.0001). This evidence concerns the gene STX1A and hemolytic-uremic syndrome.