<unk><unk> <unk>  (STEC) and<unk>  E.<unk>  (VTEC) are strains of the bacterium<unk> <unk>  that produce either Shiga toxin or Shiga-like toxin (verotoxin). Only a minority of the strains cause illness in humans. The ones that do are collectively known as enterohemorrhagic E.<unk>  (EHEC) and are major causes of foodborne illness. When infecting humans, they often cause gastroenteritis, enterocolitis, and bloody diarrhea (hence the name "enterohemorrhagic") and sometimes cause a severe complication called hemolytic-uremic syndrome (HUS). The group and its subgroups are known by various names. They are distinguished from other strains of intestinal pathogenic E.<unk>  including enterotoxigenic E.<unk>  (ETEC), enteropathogenic E.<unk>  (EPEC), enteroinvasive E.<unk>  (EIEC), enteroaggregative E.<unk>  (EAEC), and diffusely adherent E.<unk>  (DAEC).
Shigatoxigenic and verotoxigenic Escherichia coli
Vancomycin-resistant Enterococcus
Enteroaggregative Escherichia coli
Carbapenem-resistant enterobacteriaceae
Methicillin-resistant Staphylococcus aureus
HACEK organisms
Vancomycin-resistant Staphylococcus aureus
Fecal coliform