Although many types of Escherichia coli (E coli) bacteria live normally in the intestinal tract, at least 5 types are known to cause diarrhea Shiga toxin–producing E coli has caused numerous outbreaks in group care settings Infections with Shiga toxin–producing E coli may be associated with other12, Testing for nonO157 Shiga toxinproducing E coli FSIS considers raw, nonintact beef products or the components of these products found to have six Shiga toxinproducing Escherichia coli (STEC) to be adulterated, in addition to E coli O157H7 These six nonO157 STECs are O26, O45, O103, O111, O121, and O145E coli are rodshaped bacterium that has an outer membrane consisting of lipopolysaccharides, inner cytoplasmic membrane, peptidoglycan layer, and an inner, cytoplasmic membrane Cell wall this structure is made of a thick layer of protein and sugar that prevents the cell from bursting Anti Escherichia Coli Antibody Bio Rad Escherichia coli e coli diagram