Bradyrhizobium elkanii

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

Overview

  • Bradyrhizobium elkanii is a Gram-negative, non-spore-forming, aerobic, motile, rod-shaped bacterium. It has been detected in at least 3 gut microbiome compilation studies or metastudies. Bradyrhizobium elkanii is probably a rare gut coloniser.



  • This organism has been recovered from human faeces, and plant endosymbiotic origin. The risk classification (www.baua.de) for this organism is 1, i.e., low risk of infection and spread. Pathogenicity status unknown, or very unlikely to be pathogenic. A possible gut commensal.
    • GENERAL CHARACTERISTICS
    Character Response
  • ⥅
  • Substrates assimilated or utilised:
  • rhamnose; alanine;
  • Active enzymes:
  • oxidase;
    • SPECIAL FEATURES
    Character Response
  • ✗
  • Metabolites not produced:
  • indole;
  • ✗
  • Nitrate:
  • not reduced
  • ✗
  • Nitrite:
  • not reduced
    • RESPONSE TO ANTIBIOTICS (Kuykendall1992);
    Class Active Resistant
  • Penicillins:
  • carbenicillin;
  • Macrolides:
  • erythromycin;
  • Tetracyclines:
  • tetracycline;
  • Quinolines:
  • nalidixic-acid;
  • Aminoglycosides:
  • streptomycin;
  • Polypep/ketides:
  • rifampicin;
  • Heterocycles:
  • chloramphenicol;

  • Walker, A. W., Sanderson, J. D., Churcher, C., Parkes, G. C., Hudspith, B. N., Rayment, N., Brostoff, J., Parkhill, J., Dougan, G., & Petrovska, L. (2011). High-throughput clone library analysis of the mucosa-associated microbiota reveals dysbiosis and differences between inflamed and non-inflamed regions of the intestine in inflammatory bowel disease. BMC Microbiology, 11, 7.

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Proteobacteria Class:  Alphaproteobacteria Order:  Hyphomicrobiales Family:  Bradyrhizobiaceae Genus:  Bradyrhizobium Gram stain:  neg O2 Relation.:  aerobic Spore:  No spore Motility:  Swimming Morphology:  Rod
    Health:  Unknown
    Source:  human faeces, and plant endosymbiotic origin
    		Aesculin:  neg Urea:  vr Gelatin:  neg
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Glucose:  neg
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    Rhamnose:  + Ala:  + Malonate:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  + Urease:  vr β-Galactosidase:  neg ArgDH:  neg
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		Indole:  neg
    ANTIBIOTICS ℞
    Penicillins & Penems (μg/mL) Cephalosporins (μg/mL) Aminoglycosides (μg/mL) Macrolides (μg/mL) Quinolones (μg/mL)
    carbenicil:  R(500; disc)
    streptomycin:  R(100; disc)
    erythromycin:  R(250; disc)
    nalidixic-acid:  R(50; disc)
    Tetracyclines (μg/mL) Vancomycin Class (μg/mL) Polypep/ketides (μg/mL) Heterocycles (μg/mL) Other (μg/mL)
    tetracycline:  R(100; disc)
    rifampicin:  R(500; disc)
    chloramphenicol:  R(500; disc)

    References

    SPECIFIC REFERENCES FOR BRADYRHIZOBIUM ELKANII
  • Kuykendall1992 - Genetic diversity in Bradyrhizobium japonicum Jordan 1982 and a proposal for Bradyrhizobium elkanii sp. nov.
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR BRADYRHIZOBIUM ELKANII
  • McLaughlin2010 - The bacteriology of pouchitis: a molecular phylogenetic analysis using 16S rRNA gene cloning and sequencing.
  • RajilicStojanovic2014 - The first 1000 cultured species of the human gastrointestinal microbiota.
  • Walker2011 - High-throughput clone library analysis of the mucosa-associated microbiota reveals dysbiosis and differences between inflamed and non-inflamed regions of the intestine in inflammatory bowel disease.
  • ...............................
    • Added: April 08, 2021