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VariovoraxRANK: GenusTAXONOMY: cellular organisms -> Bacteria -> Proteobacteria -> Betaproteobacteria -> Burkholderiales -> Comamonadaceae -> Variovorax OVERVIEW: Straight to slightly curved rods, 0.5–0.6 × 1.2–3.0 µm, occurring singly or in pairs. Gram negative. Motile by means of sparse, peritrichous flagella. Colonies are yellow due to the presence of carotenoid pigments. Aerobic, having a strictly respiratory type of metabolism with O2 as the terminal electron acceptor. Oxidase and catalase positive. Chemoorganotrophic. Some strains are capable of lithoautotrophic growth, using H2 as an energy source. These are referred to as biotype I, whereas nonlithoautotrophic strains are referred to as biotype II (Davis et al., 1969). Good growth occurs on media containing carbohydrates, organic acids, amino acids, or peptone. The mol% G + C of the DNA is: 66.8–69.4. Type species: Variovorax paradoxus This genus contains microbial species that can reside in the human gastrointestinal tract. [PMC 4262072]
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