1 mL was pour plated on sterile
petri plates and a molten HYA (15e20 mL) was added. Triplicates of
appropriate decimal dilutions of the yoghurt sample on HYA were
incubated at 37C for 72 h. Results were reported in log10(CFU g
1of yoghurt). Counts on two consecutive dilutions, which gave less
than 300 colonies per plate were used to calculate the weighted
average of colony forming units per gram of yoghurt sample (N):