Microbiology: Principles and Explorations 9th Edition

Published by Wiley
ISBN 10: 1-11874-316-4
ISBN 13: 978-1-11874-316-4

Chapter 12 - Sterilization and Disinfection - Self Quiz - Page 369: 2

Answer

The microbes in both cultures will probably not be killed completely after 6 minutes. The microbes in 36-hr culture will be killed because it is probably in logarithmic phase of growth which is the maximum time of susceptibility to disinfectants. However, for the 2-week old culture which is no longer at logarithmic growth stage, the microbes will take longer than 6 minutes for all cells to be killed.

Work Step by Step

The microbes in both cultures will probably not be killed completely after 6 minutes. The microbes in 36-hr culture will be killed because it is probably in logarithmic phase of growth which is the maximum time of susceptibility to disinfectants. However, for the 2-week old culture which is no longer at logarithmic growth stage, the microbes will take longer than 6 minutes for all cells to be killed.
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