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. 2019 Apr 17;10:739. doi: 10.3389/fmicb.2019.00739

Table 3.

Microbiological testing and acceptance criteria for probiotic ingredients or finished products intended for oral use.

Probiotic strain category Test Method Acceptance criteria (CFU/g)
Contaminant microorganisms
Non-spore-forming Non-lactic acid bacteria ISO 13559/ IDF 153 Not more than 5 × 103
Total yeasts and molds USP <2021> Not more than 100
Spore-forming Total yeasts and molds Not more than 100
Yeasts and molds Total aerobic microbial count Not more than 1 × 103
Specified microorganisms
Non-spore-forming, spore-forming, yeasts and molds Escherichia coli USP <2022> None detected in 10 g
Salmonella spp.