An original sample of water containing 4.20 X 109 CFU/mL was diluted by 4 successive 1/100 dilutions. Exactly 1 mL from the last dilution was used to prepare a pour plate. After incubation, how many colonies were present on this plate?

An original sample of water containing 4.20 X 109 CFU/mL was diluted by 4 successive 1/100 dilutions. Exactly 1 mL from the last dilution was used to prepare a pour plate. After incubation, how many colonies were present on this plate?

Basic Clinical Laboratory Techniques 6E

6th Edition

ISBN:9781133893943

Author:ESTRIDGE

Publisher:ESTRIDGE

Chapter3: Basic Hemostasis

Section3.3: Principles Of Coagulation Testing

Problem 4RQ

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An original sample of water containing 4.20 X 10⁹ CFU/mL was diluted by 4 successive 1/100 dilutions. Exactly 1 mL from the last dilution was used to prepare a pour plate. After incubation, how many colonies were present on this plate?

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