E. coli O157:H7 (Presence / Absence)

E. coli O157:H7 is one of the most pathogenic strains of E. coli. Undercooked or raw hamburger (ground beef) has been implicated in many of the documented outbreaks, however E. coliO157:H7 outbreaks have also originated from contaminated alfalfa sprouts, unpasteurized fruit juices, dry-cured salami, lettuce, game meat, and cheese curds. Raw milk was the vehicle in a school outbreak in Canada. 

This method detects the Presence or Absence of the bacterium. A confirmation charge may be incurred in cases of Presumptive Positive screens. 

50g (750g for 375g testing) minimum sample is recommended. Environmental surface samples can also be analyzed.