Confirmed E. coli results in 24-48 hours. Plates are sample-ready, eliminating the time-consuming, cumbersome step of preparing media/agar dishes. Can be used with the 3M Petrifilm Plate Reader for consistent, fast, automated reading and recording of results.3M Petrifilm E. coli/Coliform Count Plates provide a cost-effective, convenient and reliable method for testing equipment, raw materials, food products and manufacturing environmental samples. The 3M Petrifilm E. coli/Coliform Count Plate is a sample-ready-culture-medium system which contains Violet Red Bile (VRB) nutrients, a cold-water-soluble gelling agent, an indicator of glucuronidase activity (BCIG), and a tetrazolium indicator that facilitates colony enumeration in food and beverage samples.These plates provide both E. coli and total Coliform Count information with confirmed results in just 24-48 hours. By eliminating subsequent confirmation steps required with most traditional reference methods, the 3M Petrifilm E. coli/Coliform Count Plates can help increase productivity and reduce overall lab costs.