| Arcobacter thereius |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Campylobacteraceae, Genus Arcobacter,
Arcobacter thereius Houf et al. 2009.
Arcobacter thereius Houf et al. 2009.
Gram-negative, slightly curved rods, 2.5 x 0.5 μm. Motile by means of a polar
flagellum.
flagellum.
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.
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.
Undetermined.
- 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.
Negative results for alkaline phosphatase, hippuricase, urease, DN-ase & H2S production in TSI.
(c) Costin Stoica
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