Mixta intestinalis

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

Overview

  • Mixta intestinalis is a Gram-negative, non-spore-forming, facultatively anaerobic, motile, rod-shaped bacterium. The DNA G+C content is 59.1%. Mixta intestinalis is probably a rare gut coloniser. (Palmer2018; Prakash2015)



  • This organism has been recovered from human faeces (Prakash2015). Pathogenicity status unknown, or very unlikely to be pathogenic. A possible gut commensal.
    • GENERAL CHARACTERISTICS (Palmer2018); (Prakash2015);
    Character Response
  • Substrates hydrolysed or digested:
  • aesculin; cellulose;
  • 🧂
  • Salt tolerance:
  • tolerates 0.5-2.0% salt; tolerates 10% salt; Grows optimally with 0.5% salt.
  • pH
  • Acidity tolerance:
  • tolerates pH 4.2; tolerates pH 9; Grows optimally at pH 7.
  • 🌡
  • Temperature tolerance:
  • grows at 15℃; grows at 45℃;
  • ⥅
  • Substrates assimilated or utilised:
  • N-acetylglucosamine; L-arabinose; arbutin; cellubiose; aesculin; fructose; galactose; gentiobiose; glucose; glycerol; inositol; maltose; mannitol; mannose; melibiose; rhamnose; ribose; trehalose; xylose;
  • Active enzymes:
  • acid phosphatase; catalase; β-galactosidase; β-glucosidase; Leu arylamidase; trypsin; Val arylamidase;
    • SPECIAL FEATURES (Palmer2018); (Prakash2015);
    Character Response
  • ✓
  • VP test:
  • active
  • ✓
  • Nitrate:
  • reduced

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Proteobacteria Class:  Gammaproteobacteria Order:  Enterobacterales Family:  Erwiniaceae Genus:  Mixta Gram stain:  neg O2 Relation.:  facultatively anaerobic Spore:  No spore Motility:  Swimming Morphology:  Rod
    Health:  Unknown
    Source:  human faeces (Prakash2015)
    DNA G+C(%):  59.1
    Low T(℃):  15(+)
    High T(℃):  45(+)
    NaCl 0.5-2%:  0.5-2.0(+)
    NaCl >6%:  10(+)
    Opt. pH:  7
    pH 4.2-5.9:  4.2(+)
    pH >8:  9(+)
    		Aesculin:  + Urea:  neg Gelatin:  neg Arginine:  w DNA:  neg
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    L-Arabinose:  + Fructose:  + Fucose:  neg Galactose:  + Glucose:  + D-Lyxose:  neg Mannose:  + Rhamnose:  + Ribose:  + Sorbose:  neg D-Tagatose:  neg Xylose:  + Cellubiose:  + Gentiobiose:  + Maltose:  + Melezitose:  neg Melibiose:  + D-Turanose:  neg Trehalose:  + N_Acetyl_glucosamine:  + Adonitol:  neg L-Arabitol:  neg Arbutin:  + Dulcitol:  neg Erythritol:  neg Aesculin:  + Glycerol:  + Glycogen:  neg Inositol:  + Inulin:  neg Mannitol:  + Starch:  neg Xylitol:  neg Adipate:  neg Caprate:  neg Citrate:  neg Phenylacetate:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  neg Catalase:  + Urease:  neg Ac-β-glcamnd:  neg α-Fucosidase:  neg α-Galactosidase:  neg β-Galactosidase:  + α-Glucosidase:  neg β-Glucosidase:  + β-Glucuronidase:  neg α-Mannosidase:  neg Chymotrypsin:  neg Trypsin:  + CystineAA:  neg LeuAA:  + ValAA:  + AlkalineP:  neg AcidP:  + DNAse:  neg Esterase(C4):  neg EstLip(C8):  neg Lipase:  neg

    References

    SPECIFIC REFERENCES FOR MIXTA INTESTINALIS
  • Palmer2018 - Mixta gen. nov., a new genus in the Erwiniaceae.
  • Prakash2015 - Pantoea intestinalis sp. nov., isolated from the human gut.
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    • Added: July 12, 2021