ATCC medium: 440 Emerson YpSs agar, half strength
Yeast extract................2.0 g
Soluble starch...............7.5 g
K2HPO4 .......................0.5 g
MgSO4 . 7H2O .................0.25 g
Agar........................20.0 g
Distilled water..............1.0 L
Adjust pH to 7.0 +/- 0.2. Autoclave at 121C for 15 minutes.