Family Helicobacteraceae
Garrity et al. 2006
Gram negative, curved, spiral, or fusiform rods. Old or air-exposed cells become coccoid. Motile by
multiple flagella. Microaerophilic. Carbohydrates are not fermented or oxidized (except glucose
oxidation by H. pylori). Generally positive for oxidase & catalase (excepting Wolinella). Gelatin,
starch, casein, and tyrosine are not hydrolyzed. Methyl red and Voges–Proskauer are negative.
(c) Costin Stoica
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R E G N U M
PROKARYOTAE
Genus Helicobacter
Goodwin et al. 1989
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LEGEND
* marked species are not included
in ABIS biochemical database
Genus Wolinella
Tanner et al. 1981
Wolinella curva  (see Campylobacter curvus)
Wolinella recta  (see Campylobacter rectus)
Wolinella succinogenes
NOTES

According to Suerbaum et al.
Helicobacter nemestrinae Brondson et al.
1991 is a junior heterotypic synonym of
Helicobacter pylori

Helicobacter bilis include the reference
strains of Helicobacter sp. "Flexispira"
taxa 2, 3 and 8 and Finnish canine and
feline flexispira strains. M.-L. Hanninen et
al.