Arcobacter cryaerophilus
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Campylobacteraceae, Genus Arcobacter,  
Arcobacter cryaerophilus  (Neill et al. 1985) Vandamme et al. 1991.
Two subgroups (group 1A & 1B) have been described.
Gram-negative, curved cells, 0.2–0.4 x 1–3 μm. Rapid darting motility. Motile by means
of a single polar flagellum at one or both ends of the cell.  
Colonies are 1-3 mm in diameter, convex with an entire edge, dirty-yellow-pigmented,
after 48 hours inbation. Strains will grow on nutrient agar, charcoal-based and potato
starch media, and on media containing  KMnO
4, 0.001% sodium arsenite, 32 mg/l  
cephalothin, 100 U/l 5-fluorouracil, 0.02% safranin & 2% NaCl. No growth in media
with 1% glycine. Optimum growth temperature 25 ºC. No growth at 42 ºC.
Most strains of subgroup 2 grow under aerobic or microaerobic conditions at 37 ºC, in
contrast with subgroup 1 strains.
Isolated from human bacteremia and diarrhea; from chicken carcasses; from bovine, ovine, and porcine abortions; from porcine
feces, and from mastitis in cattle.
Uncertain. Associated with enteritis in humans; mastitis and abortion in animals.
  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. Euzeby J.P., List of  Prokaryotic names with Standing in Nomenclature-Genus Arcobacter, http://www.bacterio.cict.
    fr/bacdico/aa/arcobacter.html.
Positive results for nitrate reduction, catalase, oxidase & indoxyl acetate hydrolysis.
Negative results for urease, selenite reduction, hippurate hydrolysis,
and H2S production on TSI. No carbohydrates fermentation.
(c) Costin Stoica
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