BSM and WSP media supplemented with mupirocin at a concentration
of 100 mg/l were determined to be suitable for the selective enumeration
of bifidobacteria in the various probiotic supplements tested
using a colony count technique under anaerobic conditions. In addition,
the data presented by the manufacturer on the packaging was often
found to be insufficient for clear verification of the bifidobacterial number
in the probiotic supplements.