International Standard
ISO 7251:2005
Microbiology of food and animal feeding stuffs — Horizontal method for the detection and enumeration of presumptive Escherichia coli — Most probable number technique
Reference number
ISO 7251:2005
Edition 3
International Standard
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ISO 7251:2005
Published (Edition 3, 2005)
This standard was last reviewed and confirmed in 2019. Therefore this version remains current.
This standard has 1 amendment.

ISO 7251:2005

ISO 7251:2005
CHF 96
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ISO 7251:2005 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.

General information

  •  : Published
     : 2005-02
    : International Standard confirmed [90.93]
  •  : 3
     : 13
  • ISO/TC 34/SC 9
  • RSS updates


Amendments are issued when it is found that new material may need to be added to an existing standardization document. They may also include editorial or technical corrections to be applied to the existing document.

Amendment 1

Inclusion of performance testing of culture media and reagents

Edition 2023

ISO 7251:2005/Amd 1:2023
CHF 18
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Life cycle

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