Campylobacter hyointestinalis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Epsilonproteobacteria, Order Campylobacterales, Family Campylobacteraceae, Genus Campylobacter,
Campylobacter hyointestinalis subsp. hyointestinalis (Gebhart et al. 1985) On et al. 1995,
Campylobacter hyointestinalis subsp. lawsonii On et al. 1995.
Gram-negative, loosely spiraled, curved rods, 0.2-0.5 x 1.2-2.5 μm. Filamentous forms
may occur in old cultures. Motile by a one or two polar flagella. Not swarming on moist
media.
Colonies are yellowish, slightly mucoid, round, convex, 1.5-2 mm in diameter after 48
hours incubation.  Usually weakly alpha-hemolytic (green area around colonies) on
blood agar. No agar pitting. No growth at 25 ºC or less, but grow at 42 ºC.
Grow microaerobically in the presence of hydrogen. Some strains may grow
anaerobically. Can grow on media containing 0.01% ox bile (not
subsp. lawsonii),
0.032% methyl orange, 1% glycine (not
subsp. lawsonii) & 0.02% safranin. No growth
in the presence of 2% NaCl.
Subsp. hyointestinalis has been isolated from the intestines of pigs and hamsters, and cattle, deer, and human feces.
Subsp. lawsonii has been isolated from the stomach of pigs.
Undetermined. Subsp. hyointestinalis may be associated with porcine proliferative enteritis and diarrhea in animals and humans.
  1. 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.
  2. Stephen L. W. On, Buchardt Bloch, Barry Holmes, Bart Hoste, and Peter Vandamme. Campylobacter hyointestinalis subsp.
    lawsonii subsp. nov., Isolated from the Porcine Stomach, and an Emended Description of Campylobacter hyointestinalis. Int J
    Syst Bacteriol October 1995 45:767-774.
Positive results for catalase, oxidase, nitrates reduction & selenite reduction.
Negative results for alkaline phosphatase (most strains), indoxyl acetate hydrolysis, urease & hippurate hydrolysis. No carbohydrates
fermentation.
H2S production on TSI is variable(stronger for subsp. lawsonii).
(c) Costin Stoica
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