Does Proteus Contain Deaminase Enzymes?

Phenylalanine agar, also known as phenylalanine deaminase medium, contains nutrients and DL-phenylalanine. It is used to differentiate members of the genera Proteus, Morganella (which were originally classified under the genus Proteus), and Providencia from other Enterobacteriaceae.

Which species of bacteria produce the enzyme phenylalanine deaminase?

The genera Proteus, Providencia, and Morganella are related members of the Enterobacteriaceae that are lactose negative, are motile, and produce phenylalanine deaminase. There are several species of Proteus, but Proteus mirabilis and Proteus vulgaris account for the vast majority of clinical Proteus isolates.

Which bacteria is phenylalanine deaminase test positive?

Of the Enterobacteriaceae that are urea positive, only members of the Proteus, Providencia, and Morganella groups are capable of deaminating phenylalanine (2). The test can also be used to identify other Enterobacteriaceae, Buttiauxella, Rahnella, and Tatumella, which are PDA positive but are urea negative.