Francisella tularensis

(aka Brucella tularensis)

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

Overview

  • Francisella tularensis, (aka Brucella tularensis), is a Gram-negative, non-spore-forming, microaerophilic, non-motile, short rod-shaped bacterium. It has been detected in at least 1 gut microbiome compilation study or metastudy. The DNA G+C content is 34%. Francisella tularensis is unlikely to be a gut coloniser. (Sjostedt2005Bergey)



  • This organism has been recovered from many types of animals and insects. The risk classification (www.baua.de) for this organism is 3, i.e., high risk of individual infection, and some risk of spread (notes: can be passed from animals to humans). This is a dangerous pathogen. Likely to be transient and not a long-term gut commensal.
    • QUIRKS
  • Facultative intracellular parasite. Causes tularemia in humans. Can reach epidemic levels and is transmitted by zoonotic means.
    • GENERAL CHARACTERISTICS (Sjostedt2005Bergey);
    Character Response
  • 🧂
  • Salt tolerance:
  • doesn't tolerate 0% salt; doesn't tolerate 6% salt;
  • 🌡
  • Temperature tolerance:
  • Grows optimally at 37℃.
  • H+
  • Acid from carbohydrates usually produced:
  • glucose; maltose; glycerol;
  • ⥅
  • Substrates assimilated or utilised:
  • cysteine;
    • SPECIAL FEATURES (Sjostedt2005Bergey);
    Character Response
  • ✓
  • Metabolites produced:
  • H₂S;
  • ✗
  • Metabolites not produced:
  • indole;
  • ✗
  • Nitrate:
  • not reduced

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Proteobacteria Class:  Gammaproteobacteria Order:  Thiotrichales Family:  Francisellaceae Genus:  Francisella Alt. name:  Brucella tularensis Gram stain:  neg O2 Relation.:  microaerophilic Spore:  No spore Motility:  Sessile Morphology:  Short Rod
    Health:  Unknown
    Source:  many types of animals and insects
    DNA G+C(%):  34
    Opt. T:  37℃
    NaCl 0.5-2%:  0(neg)
    NaCl >6%:  6(neg)
    		Urea:  neg Gelatin:  neg
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Glucose:  + Lactose:  neg Maltose:  + Sucrose:  neg Glycerol:  +
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    Cys:  +
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  neg Catalase:  w Urease:  neg
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		H2S:  + Indole:  neg

    References

    SPECIFIC REFERENCES FOR FRANCISELLA TULARENSIS
  • McCoy1912 - Further Observations on a Plague-Like Disease of Rodents with a Preliminary Note on the Causative Agent, Bacterium Tularense
  • Sjostedt2005Bergey - Bergey's manual of systematic bacteriology. Vol. 2, The Gammaproteobacteria Part B. Family Francisellaceae, Genus I. Francisella
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR FRANCISELLA TULARENSIS
  • Lagier2016 - Culture of previously uncultured members of the human gut microbiota by culturomics.
  • ...............................
    • Added: January 14, 2022