Lab Exercise 7 - Viable Plate Count/Bacterial Population Count

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Last updated 4:38 PM on 10/10/26
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6 Terms

1
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calculation for dilution

A / A+B

A = volume of sample added to a blank (volume pipetted)

B = volume of blank (volume in the test tube)

<p>A / A+B</p><p>A = volume of sample added to a blank (volume pipetted)</p><p>B = volume of blank (volume in the test tube)</p>
2
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How are results for a plate dilution given?

colony forming units per mL (CFU/mL)

3
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calculation for plate dilution

mL plated / 1 mL

4
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calculation for final dilution

tube dilution x plate dilution

5
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standard plate count

after inoculation, count a plate that has between 30-300 colonies

calculate dilution factors between the counted plate and original culture

6
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how to calculate dilution factors between counted plate and original culture

multiply plate count by reciprocal of the dilution factors

report results as CFU/mL