STX2 and hemolytic-uremic syndrome: So far, Stx1 subtypes Stx1a, Stx1c, and Stx1d and Stx2subtypes Stx2a-o are known in STEC (Table S1).4,5 Stx2 and the subtypes Stx2a, Stx2c, and Stx2d aremost frequently found in strains associated with HUS and severe disease.6 For simplicity, we use the term Stx throughoutthe article representative for both Stx groups and the various subtypes.