Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Helicobacteraceae, Genus Helicobacter,
Helicobacter macacae Fox et al. 2013.
Gram-negative, slender and slightly curved, 0.2 x 2-3 μm cells. Nonsporulated. Motile
by a single, sheathed ﬂagellum at each end.
Grow slowly on solid agar. Produce small pinpoint colonies. Microaerophilic; no
aerobic or anaerobic growth. Grow at 37 and 42 ºC, but not at 25 ºC. Grow on media
supplemented with 1 % glycine.
Isolated from colonic contents and feces of rhesus monkeys (Macaca mulatta). Resistant to nalidixic acid and cephalothin (30 μg /
May be associated with endemic chronic diarrhea in rhessus monkeys.
- James G. Fox, Samuel R. Boutin, Laurence K. Handt, Nancy S. Taylor, Shilu Xu, Barry Rickman, Robert P. Marini, Floyd E.
Dewhirst, Bruce J. Paster, Sherri Motzel, and Hilton J. Klein. Isolation and Characterization of a Novel Helicobacter Species,
“Helicobacter macacae”, from Rhesus Monkeys with and without Chronic Idiopathic Colitis. J. Clin. Microbiol. December 2007 45:
Positive results for catalase, indoxyl acetate hydrolysis & oxidase.
Negative results for alkaline phosphatase, gamma-glutamyl transpeptidase, nitrate
reduction to nitrite & urease.
(c) Costin Stoica