Yeast extract 5 g Beef extract 10 g Peptone 10 g Glucose 20 g Tween 80 5 ml K2HPO4 2 g Sodium acetate 5 g Diamonium citrate 2 g MgSO4.7H2O 0.2 g MnSO4.4H2O 0.05 g Distilled water 1000 ml Dissolve the ingredients in water and adjust pH to 6.2 - 6.6. Distribute into tubes in high layer.