Virgibacillus siamensis

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

Overview

  • Virgibacillus siamensis is a Gram-positive, spore-forming, facultatively anaerobic, motile, rod-shaped bacterium. It has been detected in at least 1 gut microbiome compilation study or metastudy. The DNA G+C content is 38.0%. Virgibacillus siamensis is likely to be transient and not a long-term gut coloniser. (Tanasupawat2010)



  • This organism has been recovered from fermented fish, Thailand. Pathogenicity status unknown, or very unlikely to be pathogenic. Likely to be transient and not a long-term gut commensal.
    • QUIRKS
  • Unlikely gut coloniser because its optimum growth is with high salt.
    • GENERAL CHARACTERISTICS (Tanasupawat2010);
    Character Response
  • Substrates hydrolysed or digested:
  • gelatin; starch; tyrosine;
  • 🧂
  • Salt tolerance:
  • doesn't tolerate 0% salt; tolerates 20% salt; Grows optimally with 10% salt.
  • pH
  • Acidity tolerance:
  • tolerates pH 7.0-8.0; Grows optimally at pH 7.0.
  • 🌡
  • Temperature tolerance:
  • grows at 15℃; grows at 40℃; Grows optimally at 37℃.
  • H+
  • Acid from carbohydrates usually produced:
  • glucose; ribose; sorbose; xylose; cellubiose; maltose;
  • ⥅
  • Substrates assimilated or utilised:
  • raffinose;
  • Active enzymes:
  • catalase; oxidase;
    • SPECIAL FEATURES (Tanasupawat2010);
    Character Response
  • ✗
  • Metabolites not produced:
  • Hâ‚‚S; indole;
  • ✗
  • VP test:
  • not active
  • ✗
  • Nitrate:
  • not reduced
  • ±
  • Pigments:
  • red

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Firmicutes Class:  Bacilli Order:  Bacillales Family:  Bacillaceae Genus:  Virgibacillus Gram stain:  + O2 Relation.:  facultatively anaerobic Spore:  Endospore Motility:  Swimming Morphology:  Rod Pigment:  red
    Health:  Unknown
    Source:  fermented fish, Thailand
    DNA G+C(%):  38.0
    Opt. T:  37℃
    Low T(℃):  15(+)
    Mid T(℃):  40(+)
    NaCl 0.5-2%:  0(neg)
    NaCl >6%:  20(+)
    Opt. pH:  7.0
    pH 6.0-8.0:  7.0-8.0(+)
    		Aesculin:  neg Gelatin:  + Starch:  + Casein:  w Tyrosine:  + Tween:  80(neg)
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    L-Arabinose:  neg Fructose:  neg Galactose:  neg Glucose:  + Mannose:  neg Ribose:  + Sorbose:  + Xylose:  + Cellubiose:  + Lactose:  neg Maltose:  + Melezitose:  neg Melibiose:  neg Sucrose:  neg Trehalose:  neg Glycerol:  neg Inositol:  neg Salicin:  neg
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    Raffinose:  + Citrate:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  + Catalase:  + ArgDH:  neg
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		H2S:  neg Indole:  neg Pigment:  red

    References

    SPECIFIC REFERENCES FOR VIRGIBACILLUS SIAMENSIS
  • Tanasupawat2010 - Identification of moderately halophilic bacteria from Thai fermented fish ( pla-ra ) and proposal of Virgibacillus siamensis sp. nov.
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR VIRGIBACILLUS SIAMENSIS
  • Lagier2016 - Culture of previously uncultured members of the human gut microbiota by culturomics.
  • ...............................
    • Added: January 14, 2022