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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 are proteobacteria that belong to the genus Pseudomonas. There are a number of species such as P. aeruginosa, which is an opportunistic pathogen, causing infectio â¦ ns in CF patients, burn/wound victims etc..There is also the P. putida, P. fluorescens etc.haracteristics of pseudomonas aeruginosa? Pseudomonas aeruginosa is a common bacterium that causes disease  and infection in animals, including humans. It has a pearlescent  appearance and grape-like or tortilla-lik â¦ e odor and thrives in  moist surfaces.