Antibiotic Medium No. 2 (Base Agar) is used as a basal medium for microbiological assay of antibiotics.
Composition**
Ingredients Gms / Litre
Peptic digest of animal tissue (Peptone) 6.000
Beef extract 1.500
Yeast extract 3.000
Agar 15.000
Final pH ( at 25°C) 6.6±0.2
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