![]() The ammonia produce after the breakdown of the urea results in struvite (magnesium ammonium phosphate) stone formation. Urease enzyme produced by Proteus species is thought to play a major role in the production of infection-induced urinary stones. Deaminates phenylalanine to phenyl pyruvic acid.Ferments glucose but does not ferment lactose.These Proteus strains are used in an agglutination test (the Weil-Felix test) for serum antibodies produced against rickettsiae of the typhus and spotted fever groups. The bacilli possess thermostable, ‘O’ (somatic) and thermostable ‘H’ (flagellar) antigens, based upon which several serotypes have been recognized.Ĭertain strains of Proteus vulgaris(OX-19, OX-2, and OX-K) produce O antigens that are shared by some rickettsiae. 2.4 Identification: Antigenic characteristics.2.2 Laboratory Diagnosis & Identification.2.1 Biochemical Properties of Proteus mirabilis and Proteus vulgaris.
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