In a sample that has 159 CFU's, with a 10 -9 dilution. What is the CFU's/ml...

Question

Question

In a sample that has 159 CFU's, with a 10 -9 dilution. What is the CFU's/ml if 0.1ml was plated in scientific notation?

Answer 1

Answer #1

CFU/ml = = Number of colonies / Volume plated (in ml) * Dilution factor .

CFU/ml = 159 / 0.1 * 10^-⁹ = 159 * 10¹⁰ or = 1.59 * 10¹²

* Therefore 1.59 * 10¹² Colony forming Units are present in 1 ml of sample.

Answer 2

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