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Answer to Question #11764 in Microbiology for Marcy Randall

Question #11764
Negative acid from glucose tests indicate sugar was not metabolized to produce acids. How can growth be accomplished in a carbohydrate test medium when the sugar is not metabolized?
Expert's answer
It can mean two possible variants:
- a culture don't use sugar and groth
only with aminoacids from peptone.
- a culture has already utilized sugar
and proceeded to peptone nutrition. It follows with a secondary alkalinization
in the media.

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