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Plate counts are often reported as

  • A.cfu
  • B.cfu/ml
  • C.Both (a) and (b)
  • D.thousands/ml

Answer: B

Correct answer: cfu/ml

A plate count is reported as colony-forming units per millilitre - per unit volume, since the count means nothing without knowing how much was plated. The term colony-forming unit is deliberately cautious: a colony may have grown from a clump rather than from one cell, so it counts units capable of forming a colony rather than individual organisms.

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