( Superseding IS/ISO 7402 : 1993 )

Reaffirmed 2023

NATIONAL FOREWORD

This Indian Standard (Part 2) which is identical with ISO 21528-2 : 2017 ‘Horizontal method for the detection and enumeration of Enterobacteriaceae — Part 2: Colony-count technique’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Food Hygiene, Safety Management and Other Systems Sectional Committee and approval of the Food and Agriculture Division Council.

This standard was originally published as IS/ISO 7402 : 1993 ‘Microbiology — General guidance for the enumeration of Enterobacteriaceae without resuscitation — MPN technique and colony-count technique’, which was the identical adoption of the corresponding ISO standard. ISO 7402 : 1993, ISO 5552 : 1997 and ISO 8523 : 1991 were subsequently revised in 2004 and published into two parts of ISO 21528.

This standard is the identical adoption of the latest version of Part 2 of ISO 21528 which was published in 2017 after the technical revision of ISO 21528-2 : 2004.

This Indian Standard is published in two parts. The other part in this series is:

Part 1 Detection of Enterobacteriaceae

This standard supersedes the IS/ISO 7402 : 1993.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.