Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Campylobacteraceae, Genus Campylobacter,
Campylobacter upsaliensis Sandstedt and Ursing 1991. Previously known as the CNW group.
Gram-negative, curved or spiral rods,with rounded ends 0.3-0.4 x 1.2-3.0 μm. Coccoid
forms may appear when exposed to air. Motile by means of a single or bipolar flagella.
Colonies on blood agar are translucent, convex, pinpoint to 1-2 mm in diameter, after
48 hours incubation. Swarming may occur on very moist agar surfaces.
Grows microaerobically in the absence of hydrogen, but not in air or in a CO2-enriched
Grows on potato starch- and charcoal-based media, and on media containing 1.0-2%
ox-bile, 1% glycine, 0.02% safranin and 100 U/l 5-fluorouracil. Variable growth on
media containing triphenyl-tetrazolium chloride.
No growth at 25 ºC. Some strains may grow at 42 ºC.
Isolated from blood specimens of humans, from feces from humans with gastrointestinal illness, and from asymptomatic humans,
dogs, and cats; strains associated with a human abortion and a breast abscess were reported.
Uncertain. May be human enteropathogenic.
- Don J. Brenner and J.J. Farmer III, 2001. Family I. Campylobacteraceae. In: Bergey’s Manual of Systematic Bacteriology, Second
edition,Vol 2, part C, George M. Garrity (Editor-in-Chief), pp 1145-1168.
Positive results for indoxyl acetate hydrolysis, selenite reduction, nitrate reduction & oxidase.
Negative results for catalase, urease, H2S production on TSI & hippurate hydrolysis. No carbohydrates fermentation.
Alkaline phosphatase is variable.
(c) Costin Stoica