Phenol Red Mannitol Broth
Phenol Red Mannitol Broth is a liquid medium recommended to differentiate microorganisms based on their ability to ferment the carbohydrate Mannitol. Enzymatic Digest of Casein provides additional nutrients (nitrogen and carbon) to the microorganisms, while Sodium Chloride serves as source of essential electrolytes and maintains the osmotic equilibrium. The pH indicator Phenol Red shifts from red to yellow upon accumulation of acidic metabolic byproducts, thus revealing Mannitol fermentation.
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