Microbacterium liquefaciens

(aka Aureobacterium liquefaciens)

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

Overview

  • Microbacterium liquefaciens, (aka Aureobacterium liquefaciens), is a Gram-positive, non-spore-forming, strictly aerobic, non-motile, rod-shaped bacterium. It has been detected in at least 1 gut microbiome compilation study or metastudy. The DNA G+C content is 68.6%. Microbacterium liquefaciens is likely to be transient and not a long-term gut coloniser. (Takeuchi1998; Collins1983d; Suzuki2012Bergey)



  • This organism has been recovered from milk, cheese and other dairy products. 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. Likely to be transient and not a long-term gut commensal.
    • QUIRKS
  • Obligate aerobe; unlikely to be a gut coloniser.
    • GENERAL CHARACTERISTICS (Takeuchi1998); (Collins1983d); (Suzuki2012Bergey);
    Character Response
  • Substrates hydrolysed or digested:
  • aesculin; arginine; casein; gelatin; urea;
  • 🧂
  • Salt tolerance:
  • grows weakly in 7% salt;
  • pH
  • Acidity tolerance:
  • tolerates pH 4.0; tolerates pH 10;
  • 🌡
  • Temperature tolerance:
  • grows at 37℃; doesn't grow at 42℃; Grows optimally at 30℃.
  • H+
  • Acid from carbohydrates usually produced:
  • galactose; glucose;
  • ⥅
  • Substrates assimilated or utilised:
  • acetate; fumarate; malate; propionate; succinate;
  • Active enzymes:
  • arginine dihydrolase; catalase; urease;
    • SPECIAL FEATURES (Takeuchi1998); (Suzuki2012Bergey);
    Character Response
  • ✓
  • Metabolites produced:
  • Hâ‚‚S;
  • ✗
  • VP test:
  • not active
  • ✓
  • Nitrate:
  • reduced
  • Pigments:
  • bright yellow

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Actinobacteria Class:  Actinomycetia Order:  Micrococcales Family:  Microbacteriaceae Genus:  Microbacterium Alt. name:  Aureobacterium liquefaciens Gram stain:  + O2 Relation.:  strictly aerobic Spore:  No spore Motility:  Sessile Morphology:  Rod Pigment:  bright yellow
    Health:  Unknown
    Source:  milk, cheese and other dairy products
    DNA G+C(%):  68.6
    Opt. T:  30℃
    Mid T(℃):  37(+)
    High T(℃):  42(neg)
    NaCl >6%:  7(w)
    pH 4.2-5.9:  4.0(+)
    pH >8:  10(+)
    		Aesculin:  + Urea:  + Gelatin:  + Starch:  neg Casein:  + Arginine:  + Hippurate:  neg Tween:  neg
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Galactose:  + Glucose:  +
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    Acetate:  + Citrate:  neg Formate:  neg Fumarate:  + Malate:  + Propionate:  + Succinate:  +
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Catalase:  + Urease:  + ArgDH:  +
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		H2S:  + Pigment:  bright yellow

    References

    SPECIFIC REFERENCES FOR MICROBACTERIUM LIQUEFACIENS
  • Takeuchi1998 - Union of the genera Microbacterium Orla-Jensen and Aureobacterium Collins et al. in a redefined genus Microbacterium.
  • Collins1983d - Classification of some coryneform bacteria in a new genus Aureobacterium.
  • Suzuki2012Bergey - Bergey's manual of systematic bacteriology. Vol. 5, The Actinobacteria. Part A & B. Microbacteriaceae, Genus I. Microbacteria
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR MICROBACTERIUM LIQUEFACIENS
  • Lagier2016 - Culture of previously uncultured members of the human gut microbiota by culturomics.
  • ...............................
    • Added: January 14, 2022