Weeksella virosa

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

Overview

  • Weeksella virosa is a Gram-negative, non-spore-forming, 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 37.3%. Weeksella virosa is probably a rare gut coloniser. (Zhang2014)



  • This organism has been recovered from clinical specimens (UTI, rectal swab, vagina). The risk classification (www.baua.de) for this organism is 1, i.e., low risk of infection and spread (notes: opportunistic in immunocompromised patients). It is an opportunistic pathogen. A possible gut commensal.
    • GENERAL CHARACTERISTICS (Zhang2014);
    Character Response
  • Substrates hydrolysed or digested:
  • casein;
  • ±
  • Strain-dependent hydrolysis or digestion:
  • tyrosine;
  • 🌡
  • Temperature tolerance:
  • grows at 18℃; grows at 42℃;
  • ⥅
  • Substrates assimilated or utilised:
  • 3-hydroxybutyrate;
  • Active enzymes:
  • Ala arylamidase; alkaline phosphatase; acid phosphatase; Arg arylamidase; Asp arylamidase; catalase; Gly arylamidase; His arylamidase; Leu arylamidase; Leu-Gly arylamidase; oxidase; phosphoamidase; Phe arylamidase; Ser arylamidase;
  • ±
  • Strain-dependent active enzymes:
  • esterase lipase C8; pyrrolidine arylamidase; Tyr arylamidase; Val arylamidase;
    • SPECIAL FEATURES (Zhang2014);
    Character Response
  • ✓
  • Metabolites produced:
  • indole;
  • ✗
  • Metabolites not produced:
  • Hâ‚‚S;
  • ✗
  • ONPG test:
  • not active
  • KCN growth:
  • inhibited (0.008%)
  • ✗
  • Nitrate:
  • not reduced
  • ✗
  • Nitrite:
  • not reduced
  • ✗
  • Pigments:
  • not produced

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Firmicutes Class:  Bacilli Order:  Lactobacillales Family:  Leuconostocaceae Genus:  Weeksella Gram stain:  neg O2 Relation.:  aerobic Spore:  No spore Motility:  Sessile Morphology:  Rod Pigment:  neg
    Health:  Unknown
    Source:  clinical specimens (UTI, rectal swab, vagina)
    DNA G+C(%):  37.3
    Low T(℃):  18(+)
    High T(℃):  42(+)
    		Aesculin:  neg Urea:  neg Starch:  neg Casein:  + Agar:  neg DNA:  neg Tyrosine:  d(neg) Tween:  80(neg)
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Arabinose:  neg Fructose:  neg Glucose:  neg Rhamnose:  neg Xylose:  neg Cellubiose:  neg Lactose:  neg Maltose:  neg Sucrose:  neg Trehalose:  neg Adonitol:  neg Dulcitol:  neg Glycerol:  neg Inositol:  neg Mannitol:  neg Sorbitol:  neg Ethanol:  neg Salicin:  neg
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    Gluconate:  neg Citrate:  neg 3-Hydroxybutyrate:  + Malonate:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  + Catalase:  + Urease:  neg Ac-α-glcamnd:  neg Ac-β-glcamnd:  neg α-Fucosidase:  neg α-Galactosidase:  neg β-Galactosidase:  neg α-Glucosidase:  neg β-Glucosidase:  neg β-Glucuronidase:  neg α-Mannosidase:  neg Xylosidase:  neg ArgDH:  neg Chymotrypsin:  neg γ-Glu transf.:  neg LysDC:  neg OrnDC:  neg Phe deaminase:  neg Trypsin:  neg AlanineAA:  + ArgAA:  + AspAA:  + CystineAA:  neg GlyAA:  + HisAA:  + LeuAA:  + LeuGlyAA:  + ProAA:  neg PyrrolidAA:  d(neg) PheAA:  + SerAA:  + TyrAA:  d ValAA:  d(neg) AlkalineP:  + AcidP:  + DNAse:  neg Esterase(C4):  neg EstLip(C8):  d Lipase(C14):  neg Phosphoamidase:  +
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		H2S:  neg Indole:  + Pigment:  neg

    References

    SPECIFIC REFERENCES FOR WEEKSELLA VIROSA
  • Zhang2014 - Moheibacter sediminis gen. nov., sp. nov., a member of the family Flavobacteriaceae isolated from sediment, and emended descriptions of Empedobacter brevis, Wautersiella falsenii and Weeksella virosa.
  • Holmes1986a - Weeksella virosa gen. no v., sp. nov. (Formerly group IIf), found in human clinical specimens.
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR WEEKSELLA VIROSA
  • Lagier2016 - Culture of previously uncultured members of the human gut microbiota by culturomics.
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    • Added: January 14, 2022