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What would be the test results with interpretation and conclusion for Mannitol fermentation test? How can...

What would be the test results with interpretation and conclusion for Mannitol fermentation test?
How can I interpreting a mannitol fermentation test positive result for pseudomonas aeruginosa?
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Answer #1

If mannitol is fermented to produce acid end products, the pH of the medium will drop. A pH indicator in the medium is responsible to change the color to indicate acid production. The positive test consists of a color change from red to yellow, determining a pH change to acidic. The negative test indicates no color change.

A positive result of mannitol fermentation test from Pseudomonas aeruginosa will produce a yellow halo around the bacterial colony. This is the indication of acid production from the breakdowm of mannitol.

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