Shiga toxin-producing Escherichia coli (STEC) can cause diseases ranging from mild diarrhea to fatal extra-intestinal hemolytic uremic syndrome (HUS). Shiga toxin (Stx) is the key virulence factor in STEC. two Stx types (Stx1 and Stx2) and several subtypes varying in sequences. toxicity. https://steedaes.shop/product-category/single-belt-conversions/