3M™ Petrifilm™ Coliform Count Plates


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3M™ Petrifilm™ Coliform Count Plates


The 3M Petrifilm Coliform Count Plate is a sample-ready-culture-medium system which contains Violet Red Bile (VRB) nutrients, a cold-water-soluble gelling agent, and a tetrazolium indicator that facilitates colony enumeration in food and beverage samples.


These plates provide total coliform count information with confirmed results in just 24 hours. By eliminating subsequent confirmation steps required with most traditional reference methods, the 3M Petrifilm Coliform Count Plates can help increase productivity and reduce overall lab costs.


Three easy steps offer fast, easy-to-interpret results:

1) Inoculate - 3M Petrifilm Coliform Count Plates are easy to inoculate. Lift the top film and add sample. 

2) Incubate - The space saving design minimizes incubator space requirements. 

3) Enumerate - Count the colonies. Confirmed coliforms are red colonies with associated gas bubbles. Results are fast and accurate. 


  • Coliform results in 24 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.
  • This plate has been awarded Official Methods of Analysis (OMA) #986.33 for Milk, OMA #989.10 for dairy products and OMA #991.14 for Food NF VALIDATION certificates: 3M 01/02-09/89 A for all human food products (except raw shelffish), Pet Food and Environmental samples, 3M 01/02-09/89 B for all human food products (except raw shelffish), and 3M 01/02-09/89 C for all human food products by AFNOR Certification.
  • Food processors and Contract labs worldwide trust 3M Petrifilm Plates to provide accurate, efficient, consistent results.