It selects for Gram-negative bacteria. The dyes Eosin & Methylene Blue inhibit the growth of Gram-positive bacteria. It is differential because lactose fermenters form colonies that are dark in color ...
Organisms that require vitamins or other growth factors are able to grow on TSA. Eosin Methylene Blue (EMB) Agar: is a selective AND a differential medium. The selective components are the eosin and ...
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