Results (TSA)Regular Whole Milk Sour Whole Milk Regular Skim Milk Sour Skim Milk Dilution1*10 -4 1*10 -5 1*10 -1 1*10 -5 # of Colonies191205363198 Concentration (CFU/ml) 1.91*10 7 2.05*10 8 3.63*10 4 1.98*10 8