Micro December 2018
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( c ) Summary of Validated Performance Claims. —The 3M Petrifilm Rapid E. coli/ Coliform
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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