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by le-le on September 13th, 2009

le-le

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If 0.1ml of a 0.000001 dilution plate contains 56 colonies calculate the number of colony forming units per ml present in the orginal sample

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  • by tapatio on September 13th, 2009

    tapatio

    Here's my attempt/guess. If 0.1 ml has 56 colonies, then 1.0 ml has 560. The 0.000001 dilution plate is one one-millionth the concentration of the original. So the original has one million times more. So 560 million colony forming units per milliliter in the original sample. Do you agree?

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