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MacConkey agar is selective and differential. Explain why they are selective and differential, and what is...

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Biology

MacConkey agar is selective and differential. Explainwhy they are selective and differential, and what is in the mediathat enables this to occur.

What results would you expect from plating the followingmicroorganisms on MacConkey, and why?

A) Staphylococcus aureus

B) Serratia marcescens

C) Escherichia coli

Answer & Explanation Solved by verified expert
4.5 Ratings (816 Votes)
MacConkey agar is selective because it selectively allows the growth of ONLY gram negative and enteric bacilli mechanism it contains crsytal violet and bile salts which inhibit the growth of the gram    See Answer
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