The bile salts in MacConkey agar,which inhibits the growth of many bacteria,make this media differential in nature.

Name: The bile salts in MacConkey agar,which inhibits the growth of many bacteria,make this media differential in nature.
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MacConkey agar is considered both selective and differential; the bile salts and crystal violet inhibit the growth of Gram-positive bacteria, making it selective, while the lactose and pH indicator differentiate lactose fermenters from non-fermenters.

The Bile Salts in MacConkey Agar,which Inhibits the Growth of Many