In this study, we use the nomenclature proposed in 2009 at the 7th International Symposium on Shiga Toxin-Producing E. coli Infections in Buenos Aires, designating seven Stx2 subtypes as Stx2a, Stx2b, Stx2c, Stx2d, Stx2e, Stx2f, and Stx2g [23,24]. Here, STX2 is linked to escherichia coli infection.