What test is useful in the initial differentiation of Proteus, Morganella, and Providencia species from the rest of the Enterobacteriaceae?
A)Oxidation-fermentation
B)Methyl red
C)Amino acid decarboxylase
D)Phenylalanine deaminase

Question

Quizplus · Accepted Answer

The phenylalanine deaminase test determines whether an organism possesses the enzyme that deaminates phenylalanine to phenylpyruvic acid.This helps differentiate Proteus, Morganella, and Providencia species from other Enterobacteriaceae.Oxidation-fermentation is used to determine the oxidative and fermentative capabilities of an organism.Methyl red determines if bacteria further metabolize pyruvic to mixed acids.

What Test Is Useful in the Initial Differentiation of Proteus