Helicobacter mastomyrinus
Taxonomy
Morphology
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Phylum Pseudomonadota (Proteobacteria), Class Epsilonproteobacteria, Order Campylobacterales, Family Helicobacteraceae,
Genus Helicobacter, Helicobacter mastomyrinus Shen et al. 2006.
Gram-negative, spiral-shaped bacterium, 0.3-5 µm. Motile by bipolar single-sheathed
flagella.
Microaerophilic; no aerobic or anaerobic growth. Grows at 37 and 42 ºC,  but not at 25
ºC. Grows on 1 % glycine.
Isolated from the liver and cecum of mastomys (the African rodent, Mastomys natalenis), from the feces and ceca of normal mice,and
also from the cecum of a mouse with proctitis. Resistant to cephalothin and nalidixic acid.
Unknown. Can produce cytolethal distending toxin and cause enteric or hepatic cell distention.
  1. Zeli Shen, Shilu Xu, Floyd E. Dewhirst, Bruce J. Paster, Jeremy A. Pena, Irvin M. Modlin, Mark Kidd andJames G. Fox. A Novel
    Enterohepatic Helicobacter Species ‘Helicobacter mastomyrinus’ Isolated from the Liver and Intestine of Rodents. Int. J. Syst.
    Evol. Microbiol., 2006, 56, 2025-2027.
  2. Collado L, Jara R, Gonzalez S. Description of Helicobacter valdiviensis sp. nov., an Epsilonproteobacteria isolated from wild bird
    faecal samples. Int J Syst Evol Microbiol 2014; 64:1913-1919.
Positive results for catalase, oxidase, and urease (stong reaction).

Negative results for alkaline phosphatase, gamma-glutamyl transpeptidase, indoxyl acetate hydrolysis, and nitrate reduction to nitrite.
(c) Costin Stoica
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