PP1940 – Sorbitol MacConkey with Cefixime & Tellurite (CT-SMAC)

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PP1940 – Sorbitol MacConkey with Cefixime & Tellurite (CT-SMAC)

Sorbitol MacConkey with Cefixime & Tellurite (CT-Smac)
This is a selective differential medium for the isolation of Escherichia coli 0157:H7. It differs from other MacConkey medium in that Lactose has been replaced by Sorbitol.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 are Sorbitol positive and produce pink colonies. The medium is made more selective by the addition of the antimicrobial Cefixime and Potassium Tellurite.

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Organisms Ref. No Result
Escherichia coli 0157 NCTC 12900 Pale translucent colonies
Staphylococcus aureus NCTC 12981 Inhibited
Escherichia coli NCTC 12241 Inhibited