Sierra College Department of Biological Sciences

Microbiology Diagnostic Tests: Carbohydrate Deeps

These media are used to determine which types of carbohydrates bacteria are able to ferment.


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1. Which of these tubes contains organisms that are capable of fermenting the carbohydrate present?

2. What are the fermentation products present, and how are these products indicated, i.e., what evidence of fermentation is visible in the positive tube?

3. What is the name of the pH indicator in this medium?

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