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United States Department of Agriculture

Agricultural Research Service

PMP FAQs - Generation Time and Growth Rate
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1.  What is meant by the Generation Time?

The Generation Time is the time (usually in hours or days) that it takes for bacteria to divide. To convert this to Growth Rate, simply divide 0.301 by the Generation Time. [The value 0.301 is the log10 of 2.]

2.  What is meant by the Growth Rate?

The Growth Rate is the change in bacterial numbers over time, typically expressed as log10 per hour or day. To convert this value to Generation Time, divide 0.301 by the Growth Rate.


Last Modified: 1/20/2006