Mannitol Salt Agar is a modified version of the selective medium proposed by Chapman (1945). It is specifically formulated to support the growth of staphylococci while inhibiting most other bacteria due to its high sodium chloride concentration (7.5%). The medium differentiates Staphylococcus aureus based on its ability to ferment mannitol, which produces acid and changes the phenol red indicator from pink/red to yellow. This ready-to-use version is designed as a settle plate for long incubation periods, aseptically filled in 90 mm plates to ensure optimal performance in pharmaceutical and industrial microbiology applications.
Advantages
- Ready-to-use 90 mm settle plates eliminate the need for medium preparation and sterilization.
- High salt concentration (7.5% NaCl) provides strong selectivity against non-halophilic microorganisms.
- Clear visual differentiation of mannitol-fermenting S. aureus (yellow colonies with yellow zones).
- Aseptically filled and designed for long incubation periods (18–72 hours).
- Compliant with the requirements for testing non-sterile products according to harmonized pharmacopoeias (EP, USP, JP).
Technical specifications
| Catalogue number |
1.46023 |
| Product line |
Heimplate™ (Millipore) |
| Format |
Ready-to-use settle plate |
| Plate diameter |
90 mm |
| Filling volume |
30 mL |
| pH Value |
7.4 ± 0.2 (H2O, 25 °C) |
| Suitability |
Staphylococcus spp. |
| Storage temperature |
15–25 °C |
Available packaging options
| 1.46023.0020 |
Box of 20 plates |
| 1.46023.0120 |
Box of 120 plates |
