In a recent
study, MRS agar containing sorbitol incubated at 37 C under
anaerobic conditions was considered non-selective for enumeration
of L. acidophilus in Cheddar cheese manufactured using probiotic
microorganisms as adjunct cultures In contrast, in the same
study, the MRS agar with sorbitol as the only carbohydrate source
incubated at 45 C under anaerobic conditions was effective for the
selective enumeration of L. acidophilus in Cheddar cheese.