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Exam (elaborations)

MCB 3020 Chapter 14 - IMVIC Test Exam Questions and Answers

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  • Module
  • MCB 3020
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  • MCB 3020

What does IMViC stand for? - Answer-Indole, Methyl Red, Voges-Proskauer, and Citrate test. What is the IMViC test used for? - Answer-Used to identify if gut bacteria to ensure water doesn't have pathogens such as salmanella. Indole test - Answer-Detects the presence of tryptophanase to break ...

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  • October 9, 2024
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  • Exam (elaborations)
  • Questions & answers
  • MCB 3020
  • MCB 3020
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MCB 3020 Chapter 14 - IMVIC Test Exam
Questions and Answers
What does IMViC stand for? - Answer-Indole, Methyl Red, Voges-Proskauer, and
Citrate test.

What is the IMViC test used for? - Answer-Used to identify if gut bacteria to ensure
water doesn't have pathogens such as salmanella.

Indole test - Answer-Detects the presence of tryptophanase to break down tryptophan
into indole.

Indole test indicator - Answer-Kovac's reagent

Positive indole test result - Answer-Produces red top layer

Negative indole test result - Answer-Produces colorless/pale orange top layer

Medium used for indole test - Answer-SIM (Sulfide Indole Motility) deep medium =
differential

Methyl red test - Answer-Detects the ability to use glucose for energy and produce
stable acids

Medium used for methyl red test AND Voges-Proskauer test - Answer-MRVP (Methyl
Red Voges Proskaur) Broth. Contains glucose, peptone, and phosphate buffer =
differential.

Positive methyl red test result - Answer-Red broth = acidic

Negative methyl red test result - Answer-Yellow broth = basic

Voges-Proskauer test - Answer-Detects the presence of acetoin.

Voges-Proskauer test indicator - Answer-Barrit's reagent: contains alcoholic α-naphthol
(VP-A) and 40% potassium hydroxide solution (VP-B).

Positive Voges-Proskauer test result - Answer-Produces dark red top layer

Negative Voges-Proskauer test result - Answer-Produces no layer, remains dark yellow

Citrate Utilization Test - Answer-Detects the presence of citrate permease to use citrate
for energy = no glucose used!

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