This is a selective medium primarily for the isolation of Enterobacteriaceae from waters and sewage. This media differs from the original MacConkey formulation in that as well as bile salts, crystal violet has been included as an additional selective agent. This has the effect of inhibiting gram-positive micrococci.
- Storage temperature: 2 to 8°C
- Appearance: firm gel
- Colour: pale red with slight violet tinge
- Recommended incubation: aerobically at 37°C for 16 to 24 hours
- pH: 7.1 ± 0.2
- Plate size: 90mm
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