This is a differential medium for the isolation of Escherichia coli 0157:H7. It differs from other MacConkey media in that lactose has been replaced by sorbitol. As Escherichia coli 0157:H7 does not ferment sorbitol, it produces pale translucent colonies whereas most other strains of Escherichia coli do ferment sorbitol and produce pink colonies.
Sorbitol MacConkey
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Product Description
| Organisms | Ref. No | Result |
| Escherichia coli | NCTC 12241 / WDCM 00013 | Pink colonies |
| Escherichia coli 0157 | NCTC 12900 / WDCM 00014 | Pale translucent colonies |
| Staphylococcus aureus | NCTC 12981 / WDCM 00034 | Inhibited |
Recommended Incubation: Incubate aerobically at 37 ± 1°C for 16-24 hours.
