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ComamonasRANK: GenusTAXONOMY: cellular organisms -> Bacteria -> Proteobacteria -> Betaproteobacteria -> Burkholderiales -> Comamonadaceae -> Comamonas OVERVIEW: Straight or slightly curved rods or spirilla, 0.3–0.8 × 1.1–4.4 µm; occasionally longer (5–7 µm), irregularly curved cells or spirilla may occur. Cells occur separately or in pairs and are motile by means of polar or bipolar tufts of 1–5 flagella except for C. koreensis, which is nonmotile. Gram negative. No diffusible pigments are produced on nutrient agar. Oxidase and catalase positive. Aerobic. Chemoorganotrophic, oxidative carbohydrate metabolism with oxygen as the terminal electron acceptor. C. nitrativorans is also capable of denitrification. Good growth on media containing organic acids, amino acids, or peptone; few carbohydrates are used. Major fatty acids are hexadecanoic acid (C16:0), hexadecenoic acid (C16:1) and octadecenoic acid (C18:1); 3-hydroxydecanoic acid (C10:0 3OH) is always present. The major quinone is ubiquinone Q-8.The mol% G + C of the DNA is: 60–69.Type species: Comamonas terrigena This genus contains microbial species that can reside in the human gastrointestinal tract. [PMC 4262072]
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