Mannitol salt agar (MSA) contains 7.5% NaCl, the carbohydrate mannitol, and the pH indicator phenol red. Some organisms can ferment mannitol, producing acids as a by-product. Is this medium likely to be selective and/or differential? Explain.

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The Answer of Mannitol salt agar (MSA) contains 7.5% NaCl, the carbohydrate mannitol, and the pH indicator phenol red. Some organisms can ferment mannitol, producing acids as a by-product. Is this medium likely to be selective and/or differential? Explain.

Mannitol Salt Agar (MSA) Contains 7