Designed to identify both E. coli and other coliforms. With one easy test, you'll have confirmed results in just 24 to 48 hours depending on food tested.
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The 3M Petrifilm E. coli/Coliform Count Plate is a ready-made culture medium system which contains Violet Red Bile (VRB) nutrients, a cold-water-soluble gelling agent, an indicator of glucuronidase activity, and a tetrazolium indicator that facilitates colony enumeration.
The red indicator dye in the plate colors all colonies red, and the top film traps gas produced by the