Microbiology Testing FAQs — Methods & Media | HiMedia USA

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What is Antibiotic Assay Medium used for?

Antibiotic Assay Medium No.1 is used for microbiological assay of antibiotics (penicillin, streptomycin, etc.) in pharmaceutical products per USP. Standardized formulation ensures consistent results. Procedure: (1) Seed medium with test organism (Bacillus subtilis, Staph. aureus), (2) Pour into plates, (3) Place antibiotic standards and samples in wells/disks, (4) Incubate, (5) Measure inhibition zones, (6) Calculate potency vs. standards. pH and nutrient composition optimized for reproducible zone diameters. Essential for antibiotic potency testing in pharmaceutical QC.
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