lab 7 Flashcards

1
Q

IMViC Tests is used to

A

Help identify enteric bacteria (bacteria found in the gut)

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2
Q

Enteric bacteria can be

A

Pathogens
Occasional pathogens
Normal gut flora

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3
Q

IMViC Tests Consists of 4 tests:

A

Indole
Methyl Red
Vogues-Proskauer
Citrate Utilization

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4
Q

Tests of indole, a product of

A

of tryptophan hydrolysis, is present

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5
Q

Indole Test:Bacteria are grown in _____, which contain

A

SIM agar
trypotphan

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6
Q

Indole Test:Addition of Kovak’s reagent will turn indole

A

cherry red

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7
Q

Kovak’s reagent =

A

, p-dimethylaminobenzaldehye, and HCl

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8
Q

Methyl Red TestMethyl Red is a pH indicator

A

Red for solutions with a pH < 6.2
Yellow for solutions with pH > 6.2

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9
Q

The use of Methyl red is a test for

A

glucose fermentation

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10
Q

Methyl Red TestONLY tests for acidic end products of

A

fermentation

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11
Q

Vogues-Proskauer Test

A

Some organisms ferment glucose, but produce nonacidic or neutral end products

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12
Q

Some organisms ferment glucose, but produce nonacidic or neutral end products Example:

A

production of acetylmethylcarbinol by E. aerogenes

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13
Q

Addition of Barrit’s reagent will turn the solution

A

RED if non-acidic fermentation has occurred
Barrit’s reagent = α-naphthol + 4%KOH

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