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SpirosomaRANK: GenusTAXONOMY: Bacteria -> Bacteroidetes/Chlorobi group -> Bacteroidetes -> Cytophagia -> Cytophagales -> Cytophagaceae -> Spirosoma OVERVIEW: Rigid straight to curved rods, the degree of curvature varying among individual cells within a culture. The cells measure 0.5–1.0 µm × 1.5–10.8 µm. Rings 1.5–3.0 μm in outer diameter are formed by overlapping of the ends of a cell in some species. Coils and helices may be present. Long sinuous filaments up to 50 µm long may be present. Gram-stain-negative. No swimming motility occurs. Gliding motility is present (Vancanneyt et al., 2006). Resting stages are not known. Obligate or facultative aerobes. Acids are produced aerobically from a variety of carbohydrates. Optimum temperature, 20–30°C. Colonies contain a pale to light yellow, water-insoluble carotenoid pigment. Catalase-positive and oxidase-negative or positive depending upon the species. Chemo-organotrophic. Isolated from soil and freshwater sources.DNA G+C content (mol%): 51–53 (Tm).Type species: Spirosoma linguale This genus contains microbial species that can reside in the human gastrointestinal tract. [PMC 4262072] |