Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Helicobacteraceae, Genus Helicobacter,
Helicobacter rodentium Shen et al. 1997.
Gram-negative, curved to spiral rods, 0.3 x 1.5-5 μm. Motile by means of two sheathed
flagella showing a bipolar distribution. Nonsporulating.
After 4-7 days of incubation under microaerobic conditions, colonies are 1-2 mm in
diameter, but growth on solid media is frequently observed as a thin spreading film.
Can grow anaerobically, not aerobically. Nonhemolytic on Columbia blood agar (5%
sheep blood). Can grow at 37 and 42 ºC, not at 25 ºC. Grows in the presence of 1.5%
NaCl, 1% glycine, and 0.04% triphenyl-tetrazolium chloride.
Isolated from the feces and intestinal tissue samples of healthy mice. Resistant to cephalothin (30 μg/disk) and nalidixic acid (30
- 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.
- Z. Shen, J. G. Fox, F. E. Dewhirst, B. J. Paster, C. J. Foltz, L. Yan, B. Shames, and L. Perry. Helicobacter rodentium sp. nov., a
Urease-Negative Helicobacter Species Isolated from Laboratory Mice. Int J Syst Bacteriol July 1997 47:627-634.
Positive results for catalase (weak), nitrate reduction, and oxidase (weak).
Negative results for alkaline phosphatase, indoxyl acetate hydrolysis, hippurate hydrolysis, urease anf gamma-glutamyl
(c) Costin Stoica