Medium 16: PROPIONIBACTERIUM MEDIUM

    Yeast extract                 10 g 
    KH2PO4                         1 g 
    Na2HPO4.2H2O                   3 g 
    Sodium lactate (70%)          40 ml 
    Distilled water              960 ml 
 
Dissolve the solid ingredients in water and add 
the lactate. Adjust pH to 7.0 and distribute in 
high layer into screw-capped tubes.