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15 Cards in this Set
- Front
- Back
What is the application of the MRVP Test?
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Used to distinguish between members of the family Enterobacteria and differentiate them from other Gram-negative rods.
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What is in the MRVP media?
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Peptone. Glucose. and Phosphate buffer.
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The MR test is designed to detect organisms capable of performing a _____________.
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Mixed acid fermentation.
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Mixed acid fermentation?
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Overcomes the phosphate buffer in the medium and lowers the pH.
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What is the interpretation for a red result of the MR test?
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Mixed acid fermentation.
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What is the interpretation for no color change in the MR Test?
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No mixed acid fermentation.
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What is the interpretation for red in the Voges-Proskauer Test?
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2
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What is the interpretation for no color change in the Voges-Proskauer Test?
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N0 2(
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MR test is designed to detect what?
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To detect organisms capable of performing a mixed acid fermentation which overcomes the phosphate buffer in the medium and lowers the pH.
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VP is designed for organisms___________.
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That are able to ferment glucose
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Why does a positive sample turn red?
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Methyl red is red at pH 4.4 and yellow at pH 6.2. Red indicates a positive.
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What is the interpretation of orange broth?
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negative or inconclusive.
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What is the interpretation for yellow broth?
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Negative. (no mixed acid fermentation)
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What is the purpose for peptone and glucose in the media?
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Respectively they provide protein and fermentable carbohydrate.
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What is the purpose for potassium phosphate in the media?
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A buffer that resists pH changes in the medium.
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