Biochemical Tests Flashcards
1
Q
What is the catalase test used for?
A
for detection between genera
for example, between staphylococci + or listeria + and lactobacilli -
2
Q
What is the oxidase test used for?
A
distinguish bacteria that possess cytochrome c as a respiratory enzyme
3
Q
What is the common choice of reagent in oxidase test?
A
N, N, N, N,-tetramethyl-p-phenylenediamine dihydrochloride
4
Q
what is the positive result?
A
rapidly oxidised reagent
produce a purple-blue dye - Wurster’s blue
5
Q
Which bacteria would be positive?
A
Pseudomonas, Aeromonas from other gram-positive
Moraxella, Neisseria from other gram-negative
