|Helicobacter sp. strain CLO-3
Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Helicobacteraceae, Genus Helicobacter,
Helicobacter sp. strain CLO-3 Fennell et al. (1984).
Three CLO groups were described. The groups CLO-1 and CLO-2 were later formally classified as Campylobacter species by
Totten et al. (1985), and reclassified as Helicobacter cinaedi and Helicobacter fennelliae, respectively, by Vandamme et al.
Characterization of CLO-3 group is based on a single strain description.
Slender spiral rods, 0.3–0.5 x 1.5–5.0 μm. Motile by means of a single, polar, sheathed
flagellum; rapid corkscrew-like moving. Single curved, S-shaped, and straight rods are
occasionally seen. Coccoid forms develop in old cultures.
Colonies of 48 h old cultures are pinpoint and translucent. On freshly prepared or
moist media, or in older cultures, growth usually occurs as a flat and spreading zone
with a blue-gray hue and discreet colonies may be rare. No distinct odor. No growth in
aerobic or anaerobic conditions. Can grow at 42 ºC, not at 25 ºC.
Grows in 1% glycine, but not in 2% NaCl. Grows on media containing 0.04% triphenyl-
tetrazolium chloride (metallic red sheen colonies are produced).
Isolated from homosexual male.
- 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.
- Dewhirst (F.E.), Seymour (C.), Fraser (G.J.), Paster (B.J.) and Fox (J.G.): Phylogeny of Helicobacter isolates from bird and swine
feces and description of Helicobacter pametensis sp. nov. Int. J. Syst. Bacteriol., 1994, 44, 553-560.
- Vandamme (P.), Falsen (E.), Rossau (R.), Hoste (B.), Segers (P.), Tytgat (R.) and De Ley (J.): Revision of Campylobacter,
Helicobacter, and Wolinella taxonomy: emendation of generic descriptions and proposal of Arcobacter gen. nov. Int. J. Syst.
Bacteriol., 1991, 41, 88-103.
Positive results for alkaline phosphatase, catalase and indoxyl acetate hydrolysis (weak).
Negative results for nitrate reduction, gamma glutamyl transpeptidase and urease.
(c) Costin Stoica