Homework Answers
For calculation of CFU/ ml in undiluted or original samples:
We multiply the number of colonies obtained in the particular dilution plate and then dilution factor.
So we will multiply 97( number of obtained colonies ) and 106 .
= 97* 106
Or we can write it in converted form
= 9.7* 107
10 with power 7 because 97 is written in 9.7
So 97000000 CFU are present in the original undiluted sample.
This is the number of CFU present in 2.5 ml of culture.
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