BS EN ISO 21528-1:2017

This standard BS EN ISO 21528-1:2017 Microbiology of the food chain. Horizontal method for the detection and enumeration of Enterobacteriaceae is classified in these ICS categories:

• 07.100.30 Food microbiology

This document specifies a method, with 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 primary production, food production and food handling.

This method is applicable

• when the microorganisms sought are expected to need resuscitation by enrichment, and

• when the number sought is expected to be below 100 per millilitre or per gram of test sample.

A limitation on the applicability of this document is imposed by the susceptibility of the method to a large degree of variability (see Clause 11).

NOTE Enumeration can be carried out by calculation of the most probable number (MPN) after incubation in liquid medium. See Annex A.