Antibiotic Assay Medium A is used as inoculum and maintenance medium for different test organisms for antibiotic assays. Composition of this medium is in accordance with European Pharmacopoeia. Recommended for the microbiological assay of Bacitracin at pH 7.0. For other antibiotics: Josamycin, Josamycin propionate & Rifamycin sodium at pH 6.6. Gentamicin sulphate, Kanamycin monosulphate, Kanamycin acid sulphate, Neomycin sulphate, Netilmicin sulphate, Spiramycin, Streptomycin sulphate, Erythromycin & Dihydrostreptomycin sulphate at pH 7.9. Tylosin, Tylosin tartarate & Vancomycin hydrochloride at pH 8.0.