This medium contains casein and meat peptones which provide nitrogen, amino acids and peptides necessary for bacterial growth. Yeast extract is a source of B-complex vitamins. Sodium chloride is a source of essential electrolytes and maintains osmotic equilibrium. Lactose- and sucrose-fermenting colonies occasionally growing on this medium will be yellow-green in color surrounded by a yellow-green zone.

• Selective media: Brilliant Green dye is a selective agent which inhibited gram-positive bacteria and most gram-negative Bacilli.
• Recommended by the APHA and USDA for selective isolation of Salmonella from food, eggs and meat products^2,3.