Taonella mepensis

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

Overview

  • Taonella mepensis is a Gram-negative, non-spore-forming, strictly aerobic, motile, rod-shaped bacterium. It has been detected in at least 1 gut microbiome compilation study or metastudy. The DNA G+C content is 65.1%. Taonella mepensis is likely to be transient and not a long-term gut coloniser. (Dong2013)



  • This organism has been recovered from human faeces and activated sludge. Pathogenicity status unknown, or very unlikely to be pathogenic. Likely to be transient and not a long-term gut commensal.
    • QUIRKS
  • Obligate aerobe; unlikely to be a gut coloniser.
    • GENERAL CHARACTERISTICS (Dong2013);
    Character Response
  • Substrates hydrolysed or digested:
  • gelatin; starch;
  • 🧂
  • Salt tolerance:
  • tolerates 0% salt; tolerates 4% salt;
  • pH
  • Acidity tolerance:
  • tolerates pH 5.0; tolerates pH 8.0; Grows optimally at pH 6.0-7.0.
  • 🌡
  • Temperature tolerance:
  • Grows optimally at 37℃.
  • ⥅
  • Substrates assimilated or utilised:
  • arabinose; gluconate; alanine; aspartate; glutamate; ornithine; proline; serine; adipate; citrate; 3-hydroxybutyrate; 2-ketoglutarate; malate; propionate; glutamine; alaninamide; methyl succinate; succinamate;
  • Active enzymes:
  • catalase; oxidase;
    • SPECIAL FEATURES (Dong2013);
    Character Response
  • ✗
  • Metabolites not produced:
  • H₂S; indole;
  • ✓
  • NO3➔NO2:
  • reduced
    • RESPONSE TO ANTIBIOTICS (Dong2013);
    Class Active Resistant
  • Penicillins:
  • ampicillin;
  • Macrolides:
  • erythromycin;
  • Tetracyclines:
  • tetracycline;
  • Quinolines:
  • ofloxacin;
  • Aminoglycosides:
  • kanamycin; neomycin; streptomycin;
  • gentamicin;
  • Polypep/ketides:
  • rifampicin;
  • Heterocycles:
  • chloramphenicol;
  • Miscellaneous antibiotics:
  • polymyxin B;

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Proteobacteria Class:  Alphaproteobacteria Order:  Rhodospirillales Family:  Rhodospirillaceae Genus:  Taonella Gram stain:  neg O2 Relation.:  strictly aerobic Spore:  No spore Motility:  Swimming Morphology:  Rod
    Health:  Unknown
    Source:  human faeces and activated sludge
    DNA G+C(%):  65.1
    Opt. T:  37℃
    NaCl 0.5-2%:  0(+)
    NaCl 3-5%:  4(+)
    Opt. pH:  6.0-7.0
    pH 4.2-5.9:  5.0(+)
    pH 6.0-8.0:  8.0(+)
    		Aesculin:  neg Urea:  neg Gelatin:  + Starch:  +
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Glucose:  w
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    Arabinose:  + Glucose:  w Gluconate:  + Ala:  + Asp:  + Glu:  + Orn:  + Pro:  + Ser:  + Adipate:  + Citrate:  + 3-Hydroxybutyrate:  + Malate:  + Propionate:  +
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  + Catalase:  + Urease:  neg β-Galactosidase:  neg ArgDH:  neg
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		H2S:  neg Indole:  neg
    ANTIBIOTICS ℞
    Penicillins & Penems (μg/mL) Cephalosporins (μg/mL) Aminoglycosides (μg/mL) Macrolides (μg/mL) Quinolones (μg/mL)
    ampicillin:  R(10; disc)
    gentamicin:  R(10; disc)
    kanamycin:  S(30; disc)
    neomycin:  S(15; disc)
    streptomycin:  S(10; disc)
    erythromycin:  S(15; disc)
    ofloxacin:  S(5; disc)
    Tetracyclines (μg/mL) Vancomycin Class (μg/mL) Polypep/ketides (μg/mL) Heterocycles (μg/mL) Other (μg/mL)
    tetracycline:  R(30; disc)
    rifampicin:  R(5; disc)
    chloramphenicol:  R(30; disc)
    polymyxin_B:  R(30; disc)

    References

    SPECIFIC REFERENCES FOR TAONELLA MEPENSIS
  • Dong2013 - Taonella mepensis gen. nov., sp. nov., a member of the family Rhodospirillaceae isolated from activated sludge.
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    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR TAONELLA MEPENSIS
  • Yang2020 - Species-Level Analysis of Human Gut Microbiota With Metataxonomics.
  • Yang2020a - Establishing high-accuracy biomarkers for colorectal cancer by comparing fecal microbiomes in patients with healthy families
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    • Added: December 15, 2021