Helicobacter canis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Helicobacteraceae, Genus Helicobacter,
Helicobacter canis Stanley et al. 1994.
Gram-negative, curved or helical rods, typically 0.25 x 4 μm. Motile by means of two
sheathed flagella showing a bipolar distribution. Nonspore-forming.
Colonies are pinpoint, translucent, and nonpigmented after 2 days of microaerobic
incubation on blood agar. Alpha-hemolytic. Microaerophilic. No growth at 25 ºC. Grow
at 37 and 42 ºC and on media containing up to 1.5% ox-bile and 100 U/l 5-fluorouracil.
No growth on media containing 0.032% methyl orange, 1% glycine or safranin 'O'.
Canine lower intestinal tract inhabitant. One strain has been isolated from human faeces. Resistant to polymyxin B. Sensitive to
nalidixic acid.
Undetermined. Isolated from diarrhea in dogs and humans, and from the liver of a dog suffering from multifocal necrotizing hepatitis.
  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. John Stanley, Dennis Linton, Andre P. Burnens, Floyd E. Dewhirst, Robert J Owen, Anthony Porter, Stephen L. W. On, and
    Menelaos Costas. Helicobacter canis sp. nov., a new species from dogs: an integrated study of phenotype and genotype. J Gen
    Microbiol October 1993 139:2495-2504.
Positive results for alkaline phosphatase, indoxyl acetate hydrolysis & oxidase.

Negative results for catalase, urease, glucose fermentation, hydrogen sulphide
production (TSI), nitrate reduction, selenite reduction & hippurate hydrolysis.
(c) Costin Stoica
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