IS 14988 : Part 2 : 2020/ISO 11290-2 : 2017 Microbiology of the Food Chain-Horizontal Method for Detection and Enumeration of Listeria monocytogenes and of Listeria spp. - Part 2 Enumeration Method

Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 2) (First Revision) which is identical with ISO 11290-2 : 2017 ‘Microbiology of the food chain — Horizontal method for detection and enumeration of Listeria monocytogenes and of Listeria spp. — Part 2: Enumeration method’ 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 in 2002 and was identical with ISO 11290-2 : 1998 under dual numbering. The first revision of this standard has been undertaken to align it with the latest version of ISO 11290-2 : 2017.

The major changes in this revision are as follows:

a) The enumeration of Listeria monocytogenes has been modified as listed below:

1) Primary suspension with buffered peptone water, half-Fraser broth with or without supplements, and all appropriate diluents referred to in ISO 6887 (all parts).

2) Resuscitation step deleted.

3) Microscopic aspect, catalase and CAMP test for confirmation are optional.

4) Inclusion of new performance characteristics.

b) Moreover, enumeration of Listeria spp. has been included in the scope and the title changed accordingly.

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

Part 1 Detection method

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.