Shiga toxin-producing Escherichia coli O157:H7,one of the most emergent foodborne pathogens,can cause illnesses ranging from diarrhea to hemorrhagic colitis and hemolytic-uremic syndrome.Escherichia coli O157:H7is spread into the environment via fecal shedding or field application of farm effluent.The produce can be contaminated by E.coli O157:H7through soil,feces,irrigation water,manure application,insects,or postharvest washing.Fresh produces,especially leafy greens that be consumed raw,are increasingly b...