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Specifications

Selective medium for isolation and enumeration of Staphylococci. Recommended by USP for microbial limit tests. S. aureus strains produce colonies surrounded by yellow zones due to the fermentation of mannitol. Acid production is indicated by the phenol red dye. Non-pathogenic Staphylococci produce colonies surrounded by red or purple zones and are smaller in size. Most common organisms (Gram negatives) are inhibited by the high salt content.
Catalog #	M2300-10
Appearance
Pale pinkish beige to beige free-flowing powder.
Solubility	Clear to slightly hazy, yellowish to light pink and complete
Cultural Response	24-48 hrs (35°C)
Microbiological Analysis
Proteus mirabilis	Inhibited
Staphylococcus aureus	Growth, yellow colony
Staphylococcus epidermidis	Inhibited, red colony
Final pH (25°C)	7.4 ± 0.2
Alternate names	Sodium Chloride, Agar, D-Mannitol, Pancreatic Digest of Casein, Peptic Digest of Animal Tissue, Beef Extract, Phenol Red