Microsoft Word - 3M Petrifilm REC Plate OMA Manuscript 09121

ERP Methods Book

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 ( c )   Summary of Validated Performance Claims. —The 3M Petrifilm Rapid E. coli/ Coliform  1 Count Plate is considered equivalent to the U.S. Food and Drug Administration (FDA)  2

Bacteriological Analytical Manual  (BAM), Chapter 4, Enumeration of Escherichia coli and the  3

Coliform Bacteria (1), ISO 4832:2006, Microbiology of food and animal feeding stuffs ‐‐  4

Horizontal methods for the enumeration of coliforms ‐‐ Colony‐count technique  (2) and ISO  5

16649‐2:2001, Microbiology of food and animal feeding stuffs ‐‐ Horizontal methods for the  6

enumeration of beta‐glucuronidase‐positive Escherichia coli ‐‐ Part 2: Colony‐count technique at  7

44 degrees C using 5‐bromo‐4‐chloro‐3‐indolyl beta‐D‐glucuronide  (3) for a broad range of foods  8

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and select environmental surfaces.

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Definitions 

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( a )   Difference of Means. —Difference in log 10 of the average results between the 

candidate and reference method for one level of contamination . 14

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( b ) Repeatability. —Precision where independent test results are obtained with the same 

method on equivalent test items in the same laboratory by the same operator using the same  16

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equipment within short interval of time .

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( c )   Relative Standard Deviation. —The ratio of the standard deviation to the mean, often 

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reported in percentage. 

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General Information 

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December 6, 2018