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1. Why does the tube of urea turn pink when proteus grows?

2. Why does a sugar tube with phenol red turn yellow when the sugar is used?

3. Why does a simmons citrate tube turn blue when the citrate is used?

4. Why are durham tubes used in broths?

5. How do you think E.coli and Enterobacter sp will grow on TSI agar ( describe colors and sugar being used)

6. What does a positive indole test indicate? how is it determined if a bacterium produces indole?

7. Can the dulcitol and PA reactions both be positive at the same time in an EnteroPluri-test?

8. In the EnteroPluri-test, frequently two tests are run in one compartment. list the compartments that have these multiple tests?

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