Capnocytophaga

The Capnocytophaga is a genus of bacteria. It belongs to the family of Flavobacteriaceae. The model type is Capnocytophaga ochracea.

Appearance

The cells are shaped short or long and fusiform, ie they are lanceolate or spindle- shaped and have pointed ends. Also, rod-shaped cells occur. The cells can also occasionally be spirally wound. The diameter is in the range 0.42 to 0.6 microns, the length is between 2.5 to 5.7 microns. It can also be formed filaments, so coherent, elongated single cells. The cells may be pleomorphic. The Gram test is negative, it is gram- negative bacteria. The movement occurs smoothly. The optimum growth temperature is between 35 and 37 ° C.

Growth and metabolism

The genus Capnocytophaga is anaerobic optional. For growth in air (ie, aerobic growth ) it requires 5% CO ₂. Capnocytophaga is chemo- organotroph, the metabolic type is fermentation. Carbohydrates are fermented, glucose is used as final products arise mainly acetate and succinate.

System

The genus consists of the following ways:

  • Capnocytophaga canimorsus Brenner et al. 1990
  • Capnocytophaga cynodegmi Brenner et al. 1990
  • Capnocytophaga gingivalis Leadbetter et al. 1982 emend. London et al. 1985
  • Capnocytophaga granulosa Yamamoto et al. 1994
  • Capnocytophaga haemolytica Yamamoto et al. 1994
  • Capnocytophaga leadbetteri Frandsen et al. 2008
  • Capnocytophaga ochracea ( Prévot et al. 1956) Leadbetter et al. 1982
  • Capnocytophaga sputigena Leadbetter et al. 1982

Ecology

The species Capnocytophaga gingivalis, C. ochracea, C. sputigena, C. granulosa and C. haemolytica occur in the oral flora of humans, Capnocytophaga canimorsus and C. cynodegmi in the oral flora of dogs and cats. The pathogenicity for humans is uncertain, but there have been cases whereby species of Capnocytophaga were involved with are described.

Bacteroidetes Flavobacteriales
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