MRS (deMann, Rogasa and Sharpe) – sorbitol agar (1% d-sorbitol/basal
medium) and MRS-NNLP agar (MRS-nalidixic acid, neomycine sulphate,
lithium chloride and paromomycine sulphate) were prepared for the
selective enumeration of L. acidophilus LA-5 and B. animalis subsp. lactis
BB-12 respectively