Streptococcus ilei

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

Overview

  • Streptococcus ilei is a Gram-positive, non-spore-forming, facultatively anaerobic, non-motile, coccus bacterium. It has been detected in at least 1 gut microbiome compilation study or metastudy. The DNA G+C content is 42.1%. Streptococcus ilei is likely to be transient and not a long-term gut coloniser. (Hyun2021a)



  • This organism has been recovered from ileostomy effluent of a colorectal cancer patient. Is a rare opportunistic pathogen. Likely to be transient and not a long-term gut commensal.
    • GENERAL CHARACTERISTICS (Hyun2021a);
    Character Response
  • Substrates hydrolysed or digested:
  • aesculin;
  • 🧂
  • Salt tolerance:
  • tolerates 0-2% salt; Grows optimally with 0% salt.
  • pH
  • Acidity tolerance:
  • tolerates pH 6.0-8.0; Grows optimally at pH 7.
  • 🌡
  • Temperature tolerance:
  • grows at 25℃; grows at 37℃; Grows optimally at 37℃.
  • H+
  • Acid from carbohydrates usually produced:
  • fructose; glucose; mannose; sorbose; D-tagatose; aesculin; glycogen; starch; lactose; maltose; melezitose; raffinose; sucrose; D-turanose; glycerol; 5-ketogluconate; α-methyl glucoside; salicin;
  • ±
  • Strain-dependent acid from carbs:
  • galactose; ribose; melibiose; inositol; mannitol; sorbitol; N-Ac glucosamine;
  • ⥅
  • Substrates assimilated or utilised:
  • N-acetylglucosamine; arbutin; cellubiose; dextrin; fructose; galactose; glucose; glycerol; maltose; maltotriose; mannitol; mannose; melibiose; raffinose; salicin; sucrose; D-turanose; citrate; palatinose; thymidine; uridine;
  • ±
  • Strain-dependent substrate utilisation:
  • lactose; psicose; adenosine; inosine; N-acetylmannosamine;
  • Active enzymes:
  • Ala arylamidase; Arg arylamidase; arginine dihydrolase; N-Ac β-glucosaminidase; chymotrypsin; α-galactosidase; α-glucosidase; β-glucosidase; glutamic acid decarboxylase; haemagglutinin; His arylamidase; Leu arylamidase; Phe arylamidase; Ser arylamidase; Tyr arylamidase; Val arylamidase; naphthol-ASBI-P;
  • ±
  • Strain-dependent active enzymes:
  • β-galactosidase;
    • SPECIAL FEATURES
    Character Response
  • Haemolysis:
  • alpha

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Firmicutes Class:  Bacilli Order:  Lactobacillales Family:  Streptococcaceae Genus:  Streptococcus Gram stain:  + O2 Relation.:  facultatively anaerobic Spore:  No spore Motility:  Sessile Morphology:  Coccus
    Health:  Unknown
    Source:  ileostomy effluent of a colorectal cancer patient
    DNA G+C(%):  42.1
    Opt. T:  37℃
    Lower T(℃):  25(+)
    Mid T(℃):  37(+)
    NaCl 0.5-2%:  0-2(+)
    Opt. pH:  7
    pH 6.0-8.0:  6.0-8.0(+)
    		Aesculin:  + Tween:  80(neg)
    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:  d Glucose:  + Mannose:  + D-Lyxose:  neg Rhamnose:  neg Ribose:  d Sorbose:  + D-Tagatose:  + Xylose:  neg L-Xylose:  neg Cellubiose:  neg Gentiobiose:  neg Lactose:  + Maltose:  + Melezitose:  + Melibiose:  d Sucrose:  + Trehalose:  neg Turanose:  + Amygdalin:  neg Aesculin:  + Glycogen:  + Inulin:  neg Starch:  + D-Arabitol:  neg L-Arabitol:  neg Dulcitol:  neg Erythritol:  neg Glycerol:  + Inositol:  d Mannitol:  d Sorbitol:  d Xylitol:  neg Arbutin:  neg Gluconate:  neg 2-Ketogluconate:  neg 5-Ketogluconate:  + Me-α-D-Glc:  + Me-α-D-Mann:  neg Me-Xyloside:  neg NAc-α-GA:  d Salicin:  +
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    L-Arabinose:  neg Fructose:  + Fucose:  neg Galactose:  + Glucose:  + Mannose:  + Rhamnose:  neg Ribose:  neg D-Tagatose:  neg Xylose:  neg Cellubiose:  + Gentiobiose:  neg Lactose:  d Maltose:  + Maltotriose:  + Melezitose:  neg Melibiose:  + Raffinose:  + Sucrose:  + D-Turanose:  + Trehalose:  neg N_Acetyl_glucosamine:  + Amygdalin:  neg D-Arabitol:  neg Arbutin:  + Dextrin:  + Gluconate:  neg Glycerol:  + Glycogen:  neg Inositol:  neg Inulin:  neg Mannitol:  + Me-α-D-Glc:  neg Salicin:  + Sorbitol:  neg Xylitol:  neg Ala:  neg D-Ala:  neg Glu:  neg Ser:  neg Acetate:  neg Citrate:  + 3-Hydroxybutyrate:  neg L-Malate:  neg Propionate:  neg Pyruvate:  neg Succinate:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Urease:  neg Haemaggl.:  + α-Arab:  neg Ac-β-glcamnd:  + α-Fucosidase:  neg α-Galactosidase:  + β-Galactosidase:  d α-Glucosidase:  + β-Glucosidase:  + β-Glucuronidase:  neg ArgDH:  + Chymotrypsin:  + GluDC:  + AlanineAA:  + ArgAA:  + GluGluAA:  neg GlyAA:  neg HisAA:  + LeuAA:  + LeuGlyAA:  neg ProAA:  neg PheAA:  + PyrogluAA:  neg SerAA:  + TyrAA:  + ValAA:  + AlkalineP:  neg

    References

    SPECIFIC REFERENCES FOR STREPTOCOCCUS ILEI
  • Hyun2021a - Pathogenomics of Streptococcus ilei sp. nov., a newly identified pathogen ubiquitous in human microbiome.
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR STREPTOCOCCUS ILEI
  • New2022 - Collective effects of human genomic variation on microbiome function.
  • ...............................
    • Added: March 18, 2022