Micro December 2018

1

( 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

9

and select environmental surfaces.

10

11

Definitions

12

13

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

candidate and reference method for one level of contamination . 14

15

( 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

17

equipment within short interval of time .

18

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

19

reported in percentage.

20

21

General Information

22

4