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4 Cards in this Set
- Front
- Back
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Purpose of citrate test?
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determines ability of bugs to use citrate as carbon source for energy needs.
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Why is the test performed on slants?
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O2 is necessary for citrate utilization
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pH indicator for citrate test
positive test? negative test? |
bromethylene blue
turns blue remains green |
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How does test work?
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when bugs oxidize citrate they liberate CO2. CO2 combines with sodium (supplied by sodium citrate) and water to form sodium carbonate, an alkaline product.
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