Streptococcus koreensis

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

Overview

  • Streptococcus koreensis 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 koreensis is likely to be transient and not a long-term gut coloniser. (Lim2019)



  • This organism has been recovered from subgingival dental plaque from patients with periodontitis. Is a rare opportunistic pathogen. Likely to be transient and not a long-term gut commensal.
    • GENERAL CHARACTERISTICS (Lim2019);
    Character Response
  • Substrates hydrolysed or digested:
  • arginine;
  • 🧂
  • Salt tolerance:
  • tolerates 0-2% salt; Grows optimally with 0-0.5% salt.
  • pH
  • Acidity tolerance:
  • tolerates pH 5.5; tolerates pH 9; Grows optimally at pH 7.0-7.5.
  • 🌡
  • Temperature tolerance:
  • grows at 25℃; grows at 40℃; Grows optimally at 30-35℃.
  • H+
  • Acid from carbohydrates usually produced:
  • glucose; lactose; raffinose;
  • Active enzymes:
  • arginine dihydrolase; α-galactosidase; leucine aminopeptidase;
    • SPECIAL FEATURES
    Character Response
  • ✗
  • VP test:
  • not active
  • 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:  subgingival dental plaque from patients with periodontitis
    DNA G+C(%):  42.1
    Opt. T:  30-35℃
    Lower T(℃):  25(+)
    Mid T(℃):  40(+)
    NaCl 0.5-2%:  0-2(+)
    Opt. pH:  7.0-7.5
    pH 4.2-5.9:  5.5(+)
    pH >8:  9(+)
    		Aesculin:  neg Arginine:  + Hippurate:  neg
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Arabinose:  neg Glucose:  + Ribose:  neg Lactose:  + Trehalose:  neg Glycogen:  neg Inulin:  neg Starch:  neg Mannitol:  neg Sorbitol:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    α-Galactosidase:  + β-Galactosidase:  neg β-Glucosidase:  neg β-Glucuronidase:  neg ArgDH:  + LeuAP:  + PyrrolidAA:  neg AlkalineP:  neg

    References

    SPECIFIC REFERENCES FOR STREPTOCOCCUS KOREENSIS
  • Lim2019 - Streptococcus koreensis sp. nov., Isolated from Human Subgingival Dental Plaque of Periodontitis Lesion.
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR STREPTOCOCCUS KOREENSIS
  • New2022 - Collective effects of human genomic variation on microbiome function.
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    • Added: March 18, 2022