NEN-EN-ISO 7932
Microbiology - General guidance for the enumeration of Bacillus cereus - Colony-count technique at 30 °C
inactive
| Organization: | NEN |
| Publication Date: | 1 January 1998 |
| Status: | inactive |
| Page Count: | 20 |
| ICS Code (Food microbiology): | 07.100.30 |
scope:
The principle of the method specified is surface plating of a specified quantity of the test sample if the initial product is liquid, or of a specified quantity of an initial suspension in the case of other products, preparing other plates using decimal dilutions of the test sample, aerobic incubation of the plates at 30 °C, calculating the number of B. cereus per gram or per millilitre of sample from the number of confirmed colonies. Applies to products intended for human consumption or animal feeding stuffs.
Document History
May 1, 2020
Microbiology of food and animal feeding stuffs - Horizontal method for the enumeration of presumptive Bacillus cereus - Colony-count technique at 30 degrees C - Amendment 1: Inclusion of optional tests
Designate the existing NOTE as NOTE 1 and add the following new NOTE:
NOTE 2 The diversity within the Bacillus cereus group is large with 7 phylogenetic groups[21][22] and a growing number of...
December 1, 2004
Microbiology of food and animal feeding stuffs - Horizontal method for the enumeration of presumptive Bacillus cereus - Colony-count technique at 30 degrees C
This International Standard specifies a horizontal method for the enumeration of viable presumptive Bacillus cereus by means of the colony-count technique at 30 °C. It is applicable to - products...
February 1, 2002
Microbiology - General guidance for the enumeration of Bacillus cereus - Colony-count technique at 30 degrees C - Inclusion of precision data and limitation of confirmatory tests
This International Standard specifies a horizontal method for the enumeration of viable presumptive Bacillus cereus by means of the colony-count technique at 30 °C. It is applicable to - products...
NEN-EN-ISO 7932
January 1, 1998
Microbiology - General guidance for the enumeration of Bacillus cereus - Colony-count technique at 30 °C
The principle of the method specified is surface plating of a specified quantity of the test sample if the initial product is liquid, or of a specified quantity of an initial suspension in the case...