Lab 14 Flashcards
0
Q
What is MRVP test
A
Distinguishes organisms that produce acid from glucose or neutral production = acetoin.
1
Q
What is the fermentation tube
A
Contains phenol red. Detects acid and gas production from carbohydrates
2
Q
What happens if it’s a positive MR test
A
It remains red. The ph = below 4.4
3
Q
If the MR test is orange red
A
The ph 4.4-6.0
4
Q
What happens if the MR test is yellow
A
Ph above 6.0
5
Q
If acetoin is present
A
The upper part: turns red
Negative: light brown
6
Q
What happens to citrate agar if it’s a positive test
A
Changes to blue
7
Q
What bacteria is used in the lab
A
E. Coli
E. Aerogenes
A. Faecalis
P. Vulgaris
8
Q
P. Vulgaris ferments what?
A
Glucose and sucrose
