Helicobacter equorum
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
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Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Helicobacteraceae, Genus Helicobacter,
Helicobacter equorum  Moyaert et al. 2007.
Gram-negative, curved rods, rods (1.5–4 x 0.3 μm. Nonsporulating. Motile by a single,
sheathed monopolar flagellum. Cells do not possess a periplasmic fibril.
On 10 % horse blood agar, a thin, transparent spreading film is seen after 3-4 days
microaerophilic incubation at 37 ºC. No colonies were observed.  No growth is
obtained either in aerobic or anaerobic conditions at 37 ºC, or at 25 ºC or 42 ºC under
microaerobic conditions.No growth is obtained on media containing 1 % glycine, 1 %
ox bile, 1.5 % NaCl or 5 μg metronidazole/ml.
Isolated from horse faeces in Merelbeke, Belgium. Resistant to cephalotin and nalidixic acid.
Undetermined.
  1. H. Moyaert, A. Decostere, P. Vandamme, L. Debruyne, J. Mast, M. Baele, L. Ceelen, R. Ducatelle, and F. Haesebrouck.
    Helicobacter equorum sp. nov., a urease-negative Helicobacter species isolated from horse faeces. Int J Syst Evol Microbiol
    February 2007 57:213-218.
Positive results for alkaline phosphatase, L-arginine arylamidase, catalase, esterase, nitrate reduction and oxidase.

Negative results for DNase, gamma-glutamyltransferase, glucose fermentation (acid production), hippuricase, H
2S production, indoxyl
acetate hydrolysis, pyrrolidonyl arylamidase, L-aspartate arylamidase, triphenyl tetrazolium chloride reduction, and urease.
(c) Costin Stoica
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