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BS ISO 7251:2005

Withdrawn
Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Microbiology of food and animal feeding stuffs. Horizontal method for the detection and enumeration of presumptive Escherichia coli. Most probable number technique
Amended by

BS ISO 7251:2005+A1:2023

Available format(s)

Hardcopy , PDF

Withdrawn date

10-20-2023

Language(s)

English

Published date

05-05-2005

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
   4.1 Detection method
   4.2 Enumeration method
5 Diluent, culture media and reagent
6 Apparatus and glassware
7 Sampling
8 Preparation of test sample
9 Procedure
   9.1 Detection method
   9.2 Enumeration method
10 Expression of results
   10.1 Detection method
   10.2 Enumeration method
11 Test report
Annex A (normative) MPN table
Bibliography

Provides general guidelines for the detection and enumeration of presumptive Escherichia coli by means of the liquid-medium culture technique and calculation of the most probable number (MPN) after incubation at 37 degree C, then at 44 degree C.

This International Standard gives general guidelines for the detection and enumeration of presumptive Escherichia coli by means of the liquid-medium culture technique and calculation of the most probable number (MPN) after incubation at 37°C, then at 44°C. This International Standard is applicable to

  • products intended for human consumption and the feeding of animals, and

  • environmental samples in the area of food production and food handling.

WARNING — Some pathogenic strains of Escherichia coli do not grow at 44°C.

A limitation of the applicability of this International Standard is imposed by the susceptibility of the method to a large degree of variability (see Clause10).

Committee
AW/9
DevelopmentNote
Supersedes BS 5763-8(1994). (05/2005)
DocumentType
Standard
Pages
22
PublisherName
British Standards Institution
Status
Withdrawn
Supersedes

Standards Relationship
ISO 7251:2005 Identical

ISO/TS 11133-1:2009 Microbiology of food and animal feeding stuffs Guidelines on preparation and production of culture media Part 1: General guidelines on quality assurance for the preparation of culture media in the laboratory
ISO 6887-1:2017 Microbiology of the food chain — Preparation of test samples, initial suspension and decimal dilutions for microbiological examination — Part 1: General rules for the preparation of the initial suspension and decimal dilutions
ISO 7218:2007 Microbiology of food and animal feeding stuffs General requirements and guidance for microbiological examinations
ISO/TS 11133-2:2003 Microbiology of food and animal feeding stuffs Guidelines on preparation and production of culture media Part 2: Practical guidelines on performance testing of culture media
ISO 8261:2001 Milk and milk products General guidance for the preparation of test samples, initial suspensions and decimal dilutions for microbiological examination
ISO 6887-4:2017 Microbiology of the food chain — Preparation of test samples, initial suspension and decimal dilutions for microbiological examination — Part 4: Specific rules for the preparation of miscellaneous products
ISO 6887-3:2017 Microbiology of the food chain — Preparation of test samples, initial suspension and decimal dilutions for microbiological examination — Part 3: Specific rules for the preparation of fish and fishery products
ISO 6887-2:2017 Microbiology of the food chain — Preparation of test samples, initial suspension and decimal dilutions for microbiological examination — Part 2: Specific rules for the preparation of meat and meat products

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Hardcopy - English
PDF - English
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