Cultures were incubated anaerobically at 37 C for 48 h.
Total Viable counts of B. subtilis natto was made using spread plate technique.
About 15 ml nutrient agar medium was poured into plates prior to use. A pre-prepared test sample (0.1 ml) of 106
, 107, and/or 108 dilution was transferred to the surface of nutrient agar medium, the inoculums was spread evenly over the entire surface of the agar by a rotary twirling motion of the plate under the rod. Cultures were
incubated at 37 C for 24 2 h. The colonies were then counted and expressed as logarithmic colony forming units per gram (lg CFU/g) of the sample.