Haemophilus ducreyi

Bacteria
General | Carbohydrate O/F | Substrate utilisation | Enzymes | Metabolites | Antibiotics

Overview

  • Haemophilus ducreyi is a Gram-negative, non-spore-forming, aerobic, non-motile, rod-shaped bacterium. The DNA G+C content is 38%. Haemophilus ducreyi is probably a rare gut coloniser. (Kilian2005Bergey)



  • This organism has been recovered from patients with venereal disease (cause of soft chancre). The risk classification (www.baua.de) for this organism is 2, i.e., risk of individual infection, but low risk of spread. Is a known human pathogen. A possible gut commensal.
    • QUIRKS
  • Produces many peptidases.
    • GENERAL CHARACTERISTICS (Kilian2005Bergey);
    Character Response
  • ⥅
  • Substrates assimilated or utilised:
  • N-acetylneuraminic acid;
  • Active enzymes:
  • alkaline phosphatase; oxidase;
    • SPECIAL FEATURES (Kilian2005Bergey);
    Character Response
  • ✗
  • Metabolites not produced:
  • indole;
  • Haemolysis:
  • beta (weak)
  • ✓
  • Nitrate:
  • reduced
  • ✗
  • Nitrite:
  • not reduced

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Proteobacteria Class:  Gammaproteobacteria Order:  Pasteurellales Family:  Pasteurellaceae Genus:  Haemophilus Gram stain:  neg O2 Relation.:  aerobic Spore:  No spore Motility:  Sessile Morphology:  Rod
    Health:  Unknown
    Source:  patients with venereal disease (cause of soft chancre)
    DNA G+C(%):  38
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    L-Arabinose:  neg Fructose:  neg Galactose:  neg Glucose:  w Mannose:  neg Rhamnose:  neg Ribose:  neg Sorbose:  neg Xylose:  neg Cellubiose:  neg Lactose:  neg Melezitose:  neg Melibiose:  neg Sucrose:  neg Trehalose:  neg Aesculin:  neg Inulin:  neg Adonitol:  neg Dulcitol:  neg Erythritol:  neg Inositol:  neg Mannitol:  neg Sorbitol:  neg Salicin:  neg
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  + Catalase:  neg Urease:  neg α-Fucosidase:  neg α-Galactosidase:  neg β-Galactosidase:  neg α-Glucosidase:  neg β-Glucosidase:  neg β-Glucuronidase:  neg α-Mannosidase:  neg Xylosidase:  neg ArgDH:  neg OrnDC:  neg AlkalineP:  +
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		Indole:  neg

    References

    SPECIFIC REFERENCES FOR HAEMOPHILUS DUCREYI
  • Kilian2005Bergey - Bergey's manual of systematic bacteriology. Vol. 2, The Gammaproteobacteria Part B. Family Pasteurellaceae, Genus III. Haemophilus
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    • Added: October 08, 2022