ISO/FDIS 7889
Superseded
Yoghurt — Enumeration of characteristic microorganisms — Colony-count technique
Hardcopy , PDF
English, French
09-19-2025
02-13-2026
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 CXS243‑2003[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 10colonies 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 100cfu/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 10colonies 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 1000cfu/g.
| Committee |
ISO/TC 34/SC 5
|
| DocumentType |
Draft
|
| Pages |
16
|
| PublisherName |
International Organization for Standardization
|
| RevisionOf | |
| Status |
Superseded
|
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