The 3M™ Petrifilm™ Select E. coli (SEC) Count Plates are specific for E. coli, only E. coli colonies are visible which numerate within 24 hours
The 3M™ Petrifilm™ Select E. coli Count Plate is a sample-ready-culture- medium system which contains selective agents, nutrients, a cold-water-soluble gelling agent, and an indicator of glucuronidase activity, 5-bromo-4-chloro-3-indolyl-β-D-glucuronide (BCIG), that facilitates colony enumeration. Petrifilm SEC plates are used for the enumeration of Escherichia coli in the food and beverage industries. Petrifilm SEC plate components are decontaminated though not sterilized. 3M Microbiology is certified to ISO (International Organization for Standardization) 9001. Most E. coli strains are thermotolerant and produce beta-glucuronidase, an enzyme that reacts with BCIG indicator in Petrifilm SEC Plates to produce dark green to blue-green colonies. Warning: Do not use this plate for the detection of E. coli O157. Like most other E. coli media, this plate will not specifically indicate whether any O157 strain is present. Because most O157 strains are atypical E. coli, for example they are glucuronidase negative and they will not produce a blue-green color, they will not be detected on Petrifilm SEC plate.
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