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Salt agar is a

  • A.differential media
  • B.enriched media
  • C.selective media
  • D.simple media

Answer: C

Correct answer: selective media

Salt (mannitol salt) agar contains about 7.5% sodium chloride, which inhibits most bacteria while staphylococci tolerate it. Suppressing the unwanted flora so that one group can grow is exactly what makes a medium selective.

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