Campylobacter concisus
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Campylobacteraceae, Genus Campylobacter,
Campylobacter concisus
Tanner, Badger, Lai, Listgarten, Visconti and Socransky 1981.
Gram-negative cells, small and curved, 0.5 x 4 μm, with rounded ends. Motile by
means of a single polar flagellum. Presents a membrane-like polar cap at the
extremities. Endospores are not produced.
Colonies are convex, translucent, 1 mm in diameter, with entire edges, not pitting the
agar. Nonhemolytic. Does not grow microaerobically on common agar bases in an
atmosphere without hydrogen. Does not grow in semisolid medium (0.16% agar), in
air, or in an atmosphere containing
O2:CO2:N2 (5:10:85). Growth is stimulated in broth
cultures by formate and fumarate. Strains were shown to be chemotactic toward
formate.
Does not grow on MacConkey agar or on media containing 3.5% NaCl, 32 mg/l
cephalothin, 64 mg/l cefoperazone or 0.04% triphenyl-tetrazolium chloride.
Grow on media containing 0.032% methyl orange and 0.05% sodium fluoride. May
grow at 42 ºC, but not at 25 ºC.
Isolated from the gingival crevices of humans, in normal and diarrheic feces of humans, in human blood, and in human stomach
and esophagus specimens.
Unknown pathogenicity. May be a cause of gingivitis, periodontitis, and periodontosis in humans.
  1. Don J. Brenner and J.J. Farmer III, 2001. Family I. Campylobacteraceae. In: Bergey’s Manual of Systematic Bacteriology, Second
    edition,Vol 2, part C, George M. Garrity (Editor-in-Chief), pp 1145-1168.
  2. Tanner (A.C.R.), Badger (S.), Lai (C.H.), Listgarten (M.A.), Visconti (R.A.) And Socransky (S.S.): Wolinella gen. nov., Wolinella
    succinogenes (Vibrio succinogenes Wolin et al.) comb. nov., and description of Bacteroides gracilis sp. nov., Wolinella recta sp.
    nov., Campylobacter concisus sp. nov., and Eikenella corrodens from humans with periodontal disease. Int. J. Syst. Bacteriol.,
    1981, 31, 432-445.
Oxidase positive. Negative for catalase, indoxyl acetate hydrolysis, urea hydrolysis, hippurate hydrolysis, selenite reduction, nitrate
reduction & H
2S production on TSI (with some exceptions). No carbohydrates fermentation.
(c) Costin Stoica
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