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EVS-ISO 21528-1:2011

Microbiology of food and animal feeding stuffs - Horizontal methods for the detection and enumeration of Enterobacteriaceae - Part 1: Detection and enumeration by MPN technique with pre-enrichment

General information

Withdrawn from 17.07.2017
Base Documents
ISO 21528-1:2004
Directives or regulations
None

Standard history

Status
Date
Type
Name
17.07.2017
Main
05.12.2011
Main
This part of ISO 21528 specifies a method, with pre-enrichment, for the detection of Enterobacteriaceae. It 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. Enumeration is carried out by calculation of the most probable number (MPN) after incubation at 37 °C (or 30 °C) in liquid medium. This method is applicable: - when the microorganisms sought are expected to need resuscitation before enrichment, and - when the number sought is expected to be in the range 1 to 100 per millilitre or per gram of test sample. A limitation on the applicability of this part of ISO 21528 is imposed by the susceptibility of the method to a large degree of variability (see Clause 11).

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