Helicobacter aurati
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
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Pathogenicity
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Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Helicobacteraceae, Genus Helicobacter,
Helicobacter aurati Patterson et al. 2002.
Gram-negative, fusiform cells, 0.6 x 4–5 μm. Periplasmic fibers are coiled around the
cell body, giving a crisscross appearance to the bacterial surface. Coccoid forms
appear in older cultures. Motile by means of bipolar tufts of 7–10 sheathed flagella.
Culture on 5% sheep blood agar or 5% fetal calf serum agar, under microaerobic
conditions does not result in single colonies; growth occurs as a thin spreading film.
No growth under anaerobic conditions. Microaerobic growth occurs at 37 and 42 ºC
but not at 25 ºC. Brucella agar plates containing 1% glycine, 1.5% NaCl, 2.0% NaCl,
and 3.0% NaCl do not support growth. Sensitive to nalidixic acid (30 μg) but resistant
to cephalothin (30 μg) in disk diffusion tests.
Isolated from the golden Syrian hamster, Mesocricetus auratus.
Undetermined. Isolated from inflamed stomachs and ceca of the Syrian hamster.
  1. George M. Garrity, Julia A. Bell and Timothy Lilburn, 2001. Family II. Helicobacteraceae. In:  Bergey’s Manual of Systematic
    Bacteriology, Second edition,Vol 2, part C, George M. Garrity (Editor-in-Chief), pp 1168-1195.
  2. M. M. Patterson, M. D. Schrenzel, Y. Feng, S. Xu, F. E. Dewhirst, B. J. Paster, S. A. Thibodeau, J. Versalovic, and J. G. Fox.
    Helicobacter aurati sp. nov., a Urease-Positive Helicobacter Species Cultured from Gastrointestinal Tissues of Syrian Hamsters.
    J. Clin. Microbiol. October 2000 38:10 3722-3728.
  3. K. A. Eaton, F. E. Dewhirst, M. J. Radin, J. G. Fox, B. J. Paster, S. Krakowka, and D. R. Morgan. Helicobacter acinonyx sp. nov.,
    Isolated from Cheetahs with Gastritis. Int J Syst Bacteriol January 1993 43:99-106.
Positive results for catalase, oxidase, urease, gamma-glutamyl transpeptidase and indoxyl acetate hydrolysis.

Negative results for nitrates reduction, hippurate hydrolysis and alkaline phosphatase.
(c) Costin Stoica
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