Four sets of 30 ml of soybean milk were separately inoculated with S. Typhimurium at the final concentration of 106 CFU/ml. The bacteriophage suspension was added to 3 of 4 sets of soybean milk at different concentrations which were 106, 107 and 108 PFU/ml. The set of soybean milk without bacteriophage was used as a control. All treatments were incubated at 37°C and their samples were collected at 0, 3, 6, 9, and 24 h after bacteriophage inoculation for the determination of bacterial counts. The determination of bacterial concentration in the beverage was performed by plating on Xylose lysine deoxycholate (XLD) agar, a selective medium for S. Typhimurium.