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Describe what EMB, MacConkey's, and Hetoen enteric agar plates are used for and how organisms are...

Describe what EMB, MacConkey's, and Hetoen enteric agar plates are used for and how organisms are distinguished on these plates.

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Answer #1

Eosin methylene blue agar is used to isolate fecal coliforms Eosin Y and inhibit the growth of gram positive bacteria. Methylene blue is used to differentiate between the organisms.

MacConkeys agar plates is used to isolate gram negative and enteric bacilli. Organisms are differentiated on the basis of lactose fermentation.

Heteon enteric agar plates are used to identify gastrointestinal pathogen like salmonella and shigella. Bile salts are used to distinguish between the organism.

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