FIELD: biotechnology.
SUBSTANCE: method for differential enumeration of lactic acid bacteria in a dairy product is disclosed. Method includes inoculation of aliquots of a dairy product into culture dishes containing a chemically defined agar medium and chromogenic substrates producing different colours of the analysed colonies of strains Lactobacillus paracasei subsp. paracasei, Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus; then they are cultivated in selective conditions and the colonies of different colours are counted.
EFFECT: method allows to specifically differentiate and count the strains of lactic acid bacteria in the dairy product.
9 cl, 14 tbl, 1 ex
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