Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Campylobacteraceae, Genus Arcobacter,
Arcobacter thereius Houf et al. 2009.
Gram-negative, slightly curved rods, 2.5 x 0.5 μm. Motile by means of a polar
Colonies on Sheep blood agar incubated in microaerobic conditions at 28 ºC for 72
hours are whitish, low-convex, smooth-rounded with entire margins of about 2 mm in
diameter. Non-swarming. Hemolysis is variable.
On Arcobacter selective agar forms translucent to opaque smooth-rounded colonies
of 1-2 mm diameter. In a microaerobic atmosphere, growth is observed at room
temperature (18-22 ºC) and 30 ºC, but not at 37 ºC after 3 days incubation. No growth
occurs at 37 ºC in aerobic conditions; growth occurs at 25 and 30 ºC aerobically.
Grow on non-supplemented minimal and potato starch media, and on media
containing 1.0% glycine, 2.0% NaCl, 0.05% safranin and 32 mg carbenicillin, 32 mg/L
cephalothin, 64 mg/L cefoperazone, 0.05% sodium fluoride, 0.001% sodium arsenite
and 0.032% methyl orange.
No growth on casein, tyrosine, 0.02% pyronine media or media containing 4.0% NaCl.
Variable growth on MacConkey, lecithin and Campylobacter charcoal-deoxycholate base media, and on media containing 0.04%
triphenyl-tetrazolium chloride, 0.1% potassium permanganate, basic fuchsin, Crystal violet or Janus green.
Isolated from the kidney and liver of an aborted pig foetuses and from the cloacal content of ducks in Denmark.
- Kurt Houf, Stephen L. W. On, Tom Coenye, Lies Debruyne, Sarah De Smet, and Peter Vandamme. Arcobacter thereius sp. nov.,
isolated from pigs and ducks. Int J Syst Evol Microbiol October 2009 59:2599-2604.
- Luis Collado and Maria José Figueras. Taxonomy, Epidemiology, and Clinical Relevance of the Genus Arcobacter. Clin. Microbiol.
Rev. 2011, 24(1):174.
Positive results for oxidase, catalase, nitrate reduction & indoxyl acetate hydrolysis.
Negative results for alkaline phosphatase, hippuricase, urease, DN-ase & H2S production in TSI.
(c) Costin Stoica