Micro December 2018

100 CFU per plate for the total coliform count, and less than or equal to 100 blue to blue-green 1

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CFU per plate for the E. coli count.

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Materials and Methods

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Test Kit Information

( a ) 3M Petrifilm Rapid E. coli/ Coliform Count Plate.

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( b ) Catalog Number .—6436, 6437.

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( c ) Ordering Information .—3M Center, Food Safety Department, Bldg. 275-5W-05, St.

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Paul, MN 55144-1000, USA 1-800-328-6553.

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Test Kit Components

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3M Petrifilm Rapid E. coli /Coliform Count Plates.

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Additional Supplies and Reagents

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( a ) Butterfield’s phosphate-buffered diluent (BPBD). —FDA BAM Chapter 4.

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( b ) Peptone salt solution (PSS). —ISO 4832:2006 and ISO 16649-2:2001.

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( c ) Letheen broth. —For environmental surface sampling.

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