Mannitol Salt Agar (MSA) – Selective Medium for Staphylococcus aureus Isolation
Premium Mannitol Salt Agar – Gold Standard for Staphylococcal Detection
Precisely isolate and identify Staphylococcus aureus with our selective MSA medium – the definitive choice for food safety testing, clinical diagnostics, and pharmaceutical quality control. Formulated with 7.5% sodium chloride and phenol red indicator, this differential medium delivers unmistakable colony morphology for reliable pathogen identification per FDA BAM Chapter 12 and ISO 6888 standards.
Critical Applications:
✔️ Food Safety Testing – Dairy/meat S. aureus enumeration
✔️ Clinical Diagnostics – Wound infection identification
✔️ Pharmaceutical QC – Raw material contamination screening
✔️ Environmental Monitoring – Surface contact plates
✔️ Cosmetic Microbiology – Preservation efficacy testing
Differential Formula Components (per liter):
| Component | Quantity |
|————————————|———-|
| Pancreatic Digest of Casein | 5.0g |
| Peptic Digest of Animal Tissue | 5.0g |
| Beef Extract | 1.0g |
| D-Mannitol | 10.0g |
| Sodium Chloride | 75.0g |
| Phenol Red | 0.025g |
| Purified Agar | 15.0g |
pH: 7.4 ± 0.2 (25°C)
Validated Preparation Protocol:
Dissolve 111.0g in 1L purified water
Boil with stirring until complete dissolution
Autoclave: 121°C/15 min or 115°C/30 min
Swirl gently post-sterilization
Pour Plates at 45-50°C
