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5 Cards in this Set
- Front
- Back
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Describe three problems associated with using the Standard Plate Count (SPC) method for determining the numbers of bacteria in a sample
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1. each colony might represent more than one bacterial cell
2. medium used may affect what type of bacteria is able to grow 3. number represents only living cells, not the total number of cells |
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What are the units used for reported the number of cells determined by a standard plate count?
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colony-forming units OR cfus
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When using the standard plate count, only numbers between __________and __________are considered statistically valid.
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30 and 300
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You are asked to add 2 mL of bacterial culture to 98 mL of water. By what factor are you diluting the bacterial culture? Or, in other words, how would you label this dilution?
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1:50
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You are asked to make a 1000 X (or 1:1000) dilution of a bacterial culture in a final volume of 5000 mL. What volume of the original culture would you use? Include the units.
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5 mL
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