Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Helicobacteraceae, Genus Helicobacter,
Helicobacter cholecystus Franklin et al. 1997.
Gram-negative, straight or curved rods, 0.5–0.65 x 2–5 μm. Motile by means of a
single sheathed flagellum. Nonspore-forming.
Colonies are pinpoint and nonpigmented after 3 days microaerobic incubation
on blood agar. Growth observed under microaerophilic and anaerobic conditions but
do not grow aerobically. Grow at 37 and 42 ºC but not at 25 ºC. There is growth in the
presence of 1% glycine and 5% bile salts but not in the presence of 1.5% NaCl.
Isolated from Syrian hamsters. Resistant to 30 mg/l cephalothin. Intermediate sensitivity to nalidixic acid.
Unknown, but has been isolated from the gall bladder of Syrian hamsters afflicted with cholangiofibrosis and pancreatitis.
- 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.
- C. L. Franklin, C. S. Beckwith, R. S. Livingston, L. K. Riley, S. V. Gibson, C. L. Besch-Williford, and R. R. Hook Jr. Isolation of a novel
Helicobacter species, Helicobacter cholecystus sp. nov., from the gallbladders of Syrian hamsters with cholangiofibrosis and
centrilobular pancreatitis.J. Clin. Microbiol. December 1996 34:12 2952-8.
Positive results for oxidase, catalase, alkaline phosphatase, arginine aminopeptidase, L-arginine arylamidase, and nitrate reduction.
Negative results for urease, gamma-glutamyl-transferase, histidine aminopeptidase, leucine aminopeptidase, indoxyl acetate
hydrolysis, hippurate hydrolysis, and H2S production.
(c) Costin Stoica