Listeria welshimeri

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

Overview

  • Listeria welshimeri is a Gram-positive, non-spore-forming, facultatively anaerobic, motile, rod-shaped bacterium. It has been detected in at least 3 gut microbiome compilation studies or metastudies. The DNA G+C content is 36%. Listeria welshimeri is probably a rare gut coloniser. (Rocourt1983; Orsi2016; Mclauchlin2011Bergey)



  • This organism has been recovered from human faeces (McLauchlin2011Bergey), soil and environment. 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. Is a known gut commensal. Robust growth can have positive consequences for gut health.
    • GENERAL CHARACTERISTICS (Rocourt1983); (Orsi2016); (Mclauchlin2011Bergey);
    Character Response
  • Substrates hydrolysed or digested:
  • aesculin;
  • ±
  • Strain-dependent hydrolysis or digestion:
  • starch;
  • 🧂
  • Salt tolerance:
  • tolerates 10% salt;
  • 🌡
  • Temperature tolerance:
  • grows at 4℃;
  • H+
  • Acid from carbohydrates usually produced:
  • fructose; glucose; mannose; D-tagatose; xylose; amygdalin; starch; cellubiose; gentiobiose; lactose; maltose; melezitose; sucrose; trehalose; D-turanose; glycerol; xylitol; arbutin; 5-ketogluconate; α-methyl glucoside; β-methyl glucoside; methyl mannoside; N-Ac glucosamine; salicin;
  • ±
  • Strain-dependent acid from carbs:
  • rhamnose;
  • Active enzymes:
  • D-alanine peptidase; acid phosphatase; N-Ac α-glucosaminidase; catalase; chymotrypsin; β-glucosidase; leucine esterase; lysine aminopeptidase; α-mannosidase; β-mannosidase; phosphoamidase;
    • SPECIAL FEATURES (Rocourt1983); (Orsi2016); (Mclauchlin2011Bergey);
    Character Response
  • ✗
  • Metabolites not produced:
  • H₂S; indole;
  • ✓
  • Methyl red test:
  • active
  • ✓
  • VP test:
  • active
  • ✗
  • Haemolysis:
  • absent
  • ✗
  • Nitrate:
  • not reduced
  • ✗
  • NO3➔NO2:
  • not reduced
    • RESPONSE TO ANTIBIOTICS
    Class Active Resistant
  • Cephalosporins:
  • cefaclor; cefixime; cefoperazone; cefuroxime;

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Firmicutes Class:  Bacilli Order:  Bacillales Family:  Listeriaceae Genus:  Listeria Gram stain:  + O2 Relation.:  facultatively anaerobic Spore:  No spore Motility:  Swimming Morphology:  Rod
    Health:   Positive
    Source:  human faeces (McLauchlin2011Bergey), soil and environment
    DNA G+C(%):  36
    Low T(℃):  4(+)
    NaCl >6%:  10(+)
    		Aesculin:  + Urea:  neg Gelatin:  neg Starch:  d Hippurate:  vr Tween:  80(+)
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    D-Arabinose:  neg L-Arabinose:  neg Fructose:  + Fucose:  neg D-Fucose:  neg Galactose:  neg Glucose:  + Mannose:  + D-Lyxose:  neg Rhamnose:  d Ribose:  neg Sorbose:  neg D-Tagatose:  + Xylose:  + L-Xylose:  neg Cellubiose:  + Gentiobiose:  + Lactose:  + Maltose:  + Melezitose:  + Melibiose:  neg Sucrose:  + Trehalose:  + Turanose:  + Amygdalin:  + Dextrin:  vr Glycogen:  neg Inulin:  neg Starch:  + Adonitol:  neg D-Arabitol:  vr L-Arabitol:  neg Dulcitol:  neg Erythritol:  neg Glycerol:  + Inositol:  neg Mannitol:  neg Sorbitol:  neg Xylitol:  + Arbutin:  + Gluconate:  neg 2-Ketogluconate:  neg 5-Ketogluconate:  + Me-α-D-Glc:  + Me-α-D-Mann:  + Me-Xyloside:  neg NAc-α-GA:  + Salicin:  w(+)
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    Melibiose:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  neg Catalase:  + Urease:  neg Ac-α-glcamnd:  + Ac-β-glcamnd:  neg α-Galactosidase:  neg β-Galactosidase:  neg α-Glucosidase:  neg β-Glucosidase:  + β-Glucuronidase:  neg α-Mannosidase:  + β-Mannosidase:  + D-AlaninePA:  + ArgDH:  neg Chymotrypsin:  + LysAP:  + AlaPheProAA:  neg CystineAA:  neg PyrrolidAA:  neg AcidP:  + Lecithinase:  neg Leu esterase:  + Phosphoamidase:  +
    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)
    cefaclor:  R(MIC50): 32, MIC90: >64, RNG: (16->64)
    cefixime:  R(MIC50): >64, MIC90: >64, RNG: (>64-)
    cefoperazone:  R(MIC50): 32, MIC90: >64, RNG: (2->64)
    cefprozil:  Var(MIC50): 2, MIC90: 8, RNG: (1-8)
    cefuroxime:  R(MIC50): 32, MIC90: >64, RNG: (1->64)
    Tetracyclines (μg/mL) Vancomycin Class (μg/mL) Polypep/ketides (μg/mL) Heterocycles (μg/mL) Other (μg/mL)

    References

    SPECIFIC REFERENCES FOR LISTERIA WELSHIMERI
  • Nwaiwu2020 - What are the recognized species of the genus Listeria?.
  • Rocourt1983 - Notes: Listeria welshimeri sp. nov. and Listeria seeligeri sp. nov.
  • Orsi2016 - Characteristics and distribution of Listeria spp., including Listeria species newly described since 2009
  • Mclauchlin2011Bergey - Bergey's manual of systematic bacteriology. Vol. 3, The Firmicutes. Family Listeriaceae, Genus I. Listeria
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR LISTERIA WELSHIMERI
  • Byrd2020 - Stability and dynamics of the human gut microbiome and its association with systemic immune traits.
  • Lagier2016 - Culture of previously uncultured members of the human gut microbiota by culturomics.
  • Qin2012 - Metagenome-wide association study of gut microbiota in type 2 diabetes
  • ...............................
    • GENERAL REFERENCES FOR LISTERIA WELSHIMERI
  • Ludwig2009 - Revised road map to the phylum Firmicutes.
  • Vos2011Bergey - Bergey's manual of systematic bacteriology: Vol. 3. The Firmicutes
    • Added: April 22, 2021