This medium is recommended for selective isolation and easy detection of Escherichia coli 0157:H7 from food samples. The medium contains sorbitol as fermentable carbohydrate and chromogenic mixture instead of lactose and indicator dyes respectively. Potassium tellurite selectively inhibits Aeromonas and Providencia species. Novobiocin inhibits gram-positive bacteria. Sodium lauryl sulphate helps to inhibit the accompanying gram-positive flora.