Proteus (Proteus) - genus of bacteria belonging to the family of intestinal bacteria (Enterobacteriaceae); divided into 4 types: P. vulgaris, P. mirabilis, P. morganii, P. rettgeri. First isolated Hauser (G. Hauser, 1885).
Proteus - polymorphic gramotritsatelnyh stick with rounded ends about 0.5 microns thick and 1-3 microns in length with peritracheal located on the surface flagella. Dispute and capsules does not form; optional aerobe; optimum temperature of growth 25-37 degrees. Grows well on nutrient mediums. In dense media produces two types of colonies: a large, clear, with smooth edges (On the form) and colony forming on the surface environment of continuous wave-like plaque - the so-called phenomenon of swarming (N-form). The last property Proteus underlies the phenomenon of "creeping" (Shukevich) - the rapid spread in the freshly cut agar at sowing in the condensation water.
Biochemically bacteria of the genus Proteus lack fermenting lactose, glucose fermentation with production of acid and gas, the formation of hydrogen sulphide, a breakdown of urea and other Proteus contains the O-antigen (thermostable) and N-antigen (thermolabile). Strains of Proteus marked individuality inherent in antigenic structure, which complicates their serological classification and diagnostics. Proteus refers to the number of conditionally pathogenic bacteria can cause toxic infection, dyspepsia, and various purulent diseases. For isolation and identification of Proteus apply the same medium, as in the research on pathogenic group intestinal bacteria.