Pseudomonas
RANK: Genus
TAXONOMY: cellular organisms -> Bacteria -> Proteobacteria -> Gammaproteobacteria -> Pseudomonadales -> Pseudomonadaceae -> Pseudomonas
OVERVIEW:
'Pseudomonas' is a genus of Gram-negative, aerobic gammaproteobacteria, belonging to the family Pseudomonadaceae containing 191 validly described species. The members of the genus demonstrate a great deal of metabolic diversity, and consequently are able to colonize a wide range of niches. Their ease of culture in vitro and availability of an increasing number of Pseudomonas strain genome sequences has made the genus an excellent focus for scientific research; the best studied species include Pseudomonas aeruginosa. Straight or slightly curved rods but not helical, 0.5–1.0 × 1.5–5.0 µm. Most of the species do not accumulate granules of polyhydroxybutyrate, but accumulation of polyhydroxyalkanoates of monomer lengths higher than C4 may occur when growing on alkanes or gluconate. Do not produce prosthecae and are not surrounded by sheaths. No resting stages are known. Gram negative. Motile by one or several polar flagella; rarely nonmotile. In some species lateral flagella of short wavelength may also be formed. Aerobic, having a strictly respiratory type of metabolism with oxygen as the terminal electron acceptor; in some cases nitrate can be used as an alternate electron acceptor, allowing growth to occur anaerobically. Xanthomonadins are not produced. Most, if not all, species fail to grow under acid conditions (pH 4.5 or lower). Most species do not require organic growth factors. Oxidase positive or negative. Catalase positive. Chemoorganotrophic. Strains of the species include in their composition the hydroxylated fatty acids C10:0 3OH and C12:0, and C12:0 2OH, and ubiquinone Q-9. Widely distributed in nature. Some species are pathogenic for humans, animals, or plants.The mol% G + C of the DNA is: 58–69.Type species: Pseudomonas aeruginosa
This genus contains microbial species that can reside in the human gastrointestinal tract. [PMC 4262072]
Microbial Abundance Data: Pseudomonas
(Percent of total population with standard deviation [PMID: 22698087]) |
| Group 1 | Group 2 | Group 3 | Group 4 |
| Group 1 Avg | Buccal
Mucosa | Keratinized
Gingiva | Hard
Palate |
Group 2 Avg | Throat | Throat | Tonsils | Saliva |
Group 3 Avg | Supragingival
Plaque | Subgingival
Plaque |
Stool |
0.008 %
(0.036) |
0.006 %
(0.023) |
0.004 %
(0.035) |
0.013 %
(0.050) |
0.012 %
(0.064) |
0.043 %
(0.237) |
0.003 %
(0.009) |
0.000 %
(0.001) |
0.003 %
(0.011) |
0.001 %
(0.008) |
0.001 %
(0.005) |
0.002 %
(0.012) |
0.000 %
(0.004) |
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