ISO 7889:2026
Yoghurt — Enumeration of characteristic microorganisms — Colony-count technique
OVERVIEW
This document specifies a method for the enumeration of the characteristic microorganisms Lactobacillus delbrueckii subsp. bulgaricus (in short: L. bulgaricus) and Streptococcus thermophilus (in short: S. thermophilus) by means of the colony-count technique.
The method is applicable to yoghurts (for the definition see CXS 243-2003[7]).
The colony-count technique (pour plates) is suitable for, but not limited to, the enumeration of L. bulgaricus and S. thermophilus in test samples with a minimum of 10 colonies counted on a plate. This corresponds to a level of the characteristic microorganisms L. bulgaricus and S. thermophilus that is expected to be higher than 100 cfu/g.
The colony-count technique (spread plates) is suitable for, but not limited to, the enumeration of L. bulgaricus and S. thermophilus in test samples with a minimum of 10 colonies counted on a plate. This corresponds to a level of the characteristic microorganisms L. bulgaricus and S. thermophilus that is expected to be higher than 1 000 cfu/g.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 2026 |
| No. of Pages | 16 |
| ICS Classification | 67.100.99 Other milk products 07.100.30 Food microbiology |
| Committee | ISO/TC 34/SC 5 |
| Available for Purchase | For sale in Singapore only |
| Adoption | ISO : 0 |