Shiga toxin-producing Escherichia coli (STEC) O111:NM is an important serotype that has been incriminated in disease outbreaks
in the United States. This study characterized cattle STEC O111:NM for virulence factors and markers by PCR. Major
conclusions are that STEC O111:NM characterized in this study lacks stx2 and the full spectrum of nle gene markers, and it has
an incomplete OI-122.