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What you should know:

Proteus are Gram-negative rod-shaped Enterobacteria common to soils and the digestive tracts of animals. Most strains are motile by peritrichous flagella and exhibit swarming behavior on agar plates.


Proteobacteria (Volume 2)

Type species

Proteus vulgaris

Facultative anaerobe, oxidase-negative, catalase-positive, nitrate reduction-positive

Metabolism: respiratory and fermentative, 

Hydrolysis: amylase-negative, casease-negative, DNAse-negative, gelatinase-positive

Other: H2S-positive, indole-negative, citrate-positive, urease-positive

Structure: motile