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Pseudomonas aeruginosa reduces sulfur and nitrate, and has a characteristic green color. The API 20E Identification System is a test strip that can be used to identify Proteus vulgaris versus other bacteria. An even easier way to test this is the gelatinase test.Or, slant the bacteria on a Triple Sugar Iron slant or place them in a SIM agar deep. P. vulgaris tests positive for Hydrogen Sulfide production, changing the media to a black color around the organism, while P. aeruginosa does not produce Hydrogen Sulfide.seudomonas aeruginosa reduces sulfur and nitrate, and has a characteristic green color. The API 20E Identification System is a test strip that can be used to identify Proteus vulgaris versus other bacteria. An even easier way to test this is the gelatinase test.
Pseudomonas aeruginosa Mindy Merenghi Pseudomonas aeruginosa is a Gram-negative, rod-shaped bacterium in the Gamma Proteobacteria class. The metabolism is respiratory, and never fermentative.It can grow in the absence of oxygen (facultative aerobe), with NO3 as the respiratory electron acceptor.ll of these characteristics lead to a wide variety of diseases. The bacterium, Pseudomonas aeruginosa, is unusual because it is considered an environmental microbe, but is a common (and sometimes even fatal) opportunistic pathogen in humans.