2.2.3 Lab diag of E. coli Flashcards
1
Q
What is the indicator for E.coli in TSI?
A
A/A + gas
(Yellow = Acid)
(Red = Alkaline)
2
Q
What is the indicator for E.coli in LIA?
A
K/K
Lysine deaminase (Slant) = Negative
Lysine decarboxylase (Butt) = Positive
3
Q
What is the indicator for E.coli in Indole
A
Positive w/ presence of red ring
4
Q
What is the indicator for E.coli in Citrate
A
Negative (Green)
5
Q
What is the indicator for E.coli in MR (Methyl red)
A
Positive with red ring
6
Q
What is unique on E. coli in a colony
A
Black spot in the middle of the colony
7
Q
What is the pH of LDC in LIA?
A
6
