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You are here:Home » Culture Media » Media-Microbiological » Antibiotic Medium #11 (Powder)

Antibiotic Medium #11 (Powder)


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The activity of an antibiotic can be demonstrated under suitable conditions by its inhibitory effect on organisms. Antibiotic assays are performed by the cylinder plate method and the turbidimetric assay. These media has been formulated according to the specifications and procedures listed by the Food and Drug Administration, European Pharmacopeia, Code of Federal Regulations, and the USP. The Antibiotic Media are identified numerically and also, where applicable, with names assigned by Grove and Randall in Assay Methods of Antibiotics. Antibiotic Medium #11 is recommended for determing antibotic potency to neymycin.
Catalog #A2297-36
Storage and StabilityStore the sealed bottle containing the dehydrated medium at RT. Once opened and recapped, place the container in a low humidity environment at the same storage temperature. Protect it from moisture and light. The dehydrated medium should be discarded if it is not free flowing or if the color has changed from the original light beige color.
AppearanceLight beige, homogeneous, free flowing to containing soft lumps.
SolubilityLight to medium amber, clear, complete with heat
pH (3.1% solution at 25°C)7.9 ± 0.2
Microbiological Analysis
Micrococcus luteus (ATCC 9341)Growth
Streptococcus epidermidis (ATCC 12228)Growth
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
Alternate namesNeomycin Assay

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