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ISO 29981:2024

Historical Revision

Milk products - Enumeration of presumptive bifidobacteria - Colony count technique at 37 degrees C

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This document specifies a method for the selective enumeration of bifidobacteria in milk products by using a colony-count technique at 37 °C under anaerobic conditions.

The method is applicable to milk products, such as fermented (e.g. yoghurts) and non-fermented milks (e.g. pasteurized milks, skim milks, whey protein concentrates), milk powders and formulae (e.g. infant formulae, follow-up formulae for older infants, products for young children) where these microorganisms are present and viable, in combination with other lactic acid bacteria or alone. The method is also applicable to starter and probiotic cultures. For proposed quality criteria of dairy products, see, for example, CXS 243-2003.

Bifidobacteria used in milk products usually belong to the following species (e.g. References [7] and [10]):

—     Bifidobacterium adolescentis;

—     B. animalis subsp. animalis;

—     B. animalis subsp. lactis;

—     B. bifidum;

—     B. breve;

—     B. longum subsp. infantis;

—     B. longum subsp. longum.


SDO ISO: International Organization for Standardization
Document Number ISO 29981
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 34/SC 5
Publish Date Document Id Type View
Not Available ISO 29981:2010 Revision
Not Available ISO 29981:2024 Revision