Streptococcus didelphis

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

Overview

  • Streptococcus didelphis is a Gram-positive, non-spore-forming, facultatively anaerobic, non-motile, coccus bacterium. It has been detected in at least 2 gut microbiome compilation studies or metastudies. Streptococcus didelphis is probably a rare gut coloniser. (Whiley2011Bergey; Rurangirwa2000)



  • This organism has been recovered from opossums. The risk classification (www.baua.de) for this organism is 2, i.e., risk of individual infection, but low risk of spread (notes: animal pathogen). It is an opportunistic pathogen. A possible gut commensal.
    • QUIRKS
  • Initial catalase activity is lost in subsequent cultures.
    • GENERAL CHARACTERISTICS (Whiley2011Bergey); (Rurangirwa2000);
    Character Response
  • Substrates hydrolysed or digested:
  • hippurate;
  • ±
  • Strain-dependent hydrolysis or digestion:
  • arginine;
  • H+
  • Acid from carbohydrates usually produced:
  • glucose; ribose; pullulan; trehalose;
  • ±
  • Strain-dependent acid from carbs:
  • starch;
  • Active enzymes:
  • alkaline phosphatase; arginine dihydrolase; catalase; β-glucuronidase; Leu arylamidase;
    • SPECIAL FEATURES (Whiley2011Bergey); (Rurangirwa2000);
    Character Response
  • ✓
  • Metabolites produced:
  • lactate;
  • ✗
  • Metabolites not produced:
  • indole;
  • ✗
  • VP test:
  • not active
  • Haemolysis:
  • beta
  • ✗
  • Nitrate:
  • not reduced
    • RESPONSE TO ANTIBIOTICS (Rurangirwa2000);
    Class Active Resistant
  • Penicillins:
  • ampicillin; penicillin G;
  • ticarcillin; ticarcillin-clavulanic acid;
  • Macrolides:
  • erythromycin;
  • Tetracyclines:
  • tetracycline;
  • Aminoglycosides:
  • amikacin;
  • Polypep/ketides:
  • rifampicin;
  • Heterocycles:
  • chloramphenicol;
  • Miscellaneous antibiotics:
  • clindamycin;

    • 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:  opossums
    		Aesculin:  neg Starch:  neg Arginine:  d Hippurate:  +
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Arabinose:  neg Glucose:  + Ribose:  + Lactose:  neg Trehalose:  + Glycogen:  neg Inulin:  neg Starch:  d Mannitol:  neg Sorbitol:  neg Salicin:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Catalase:  + α-Galactosidase:  neg β-Galactosidase:  neg β-Glucosidase:  neg β-Glucuronidase:  + ArgDH:  d(+) LeuAA:  + PyrrolidAA:  neg AlkalineP:  +
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		Lactate:  + Indole:  neg
    ANTIBIOTICS ℞
    Penicillins & Penems (μg/mL) Cephalosporins (μg/mL) Aminoglycosides (μg/mL) Macrolides (μg/mL) Quinolones (μg/mL)
    Augmentin:  Var(MIC50): 4), MIC90: Var(4
    ampicillin:  S(0.12)
    penicillin_G:  S(0.12)
    ticarcillin:  R(16)
    tica-clav:  R(16)
    cephalothin:  Var(MIC50): 4), MIC90: Var(4
    amikacin:  R(MIC50): 16), MIC90: R(16, RNG: (8-64)
    gentamicin:  Var(MIC50): 2), MIC90: Var(2, RNG: (2-8)
    erythromycin:  S(MIC50): 0.5), MIC90: S(0.5, RNG: (0.5-1)
    Tetracyclines (μg/mL) Vancomycin Class (μg/mL) Polypep/ketides (μg/mL) Heterocycles (μg/mL) Other (μg/mL)
    tetracycline:  S(4)
    rifampicin:  S(1)
    chloramphenicol:  R(4)
    clindamycin:  S(0.5)

    References

    SPECIFIC REFERENCES FOR STREPTOCOCCUS DIDELPHIS
  • Whiley2011Bergey - Bergey's manual of systematic bacteriology. Vol. 3, The Firmicutes. Family Streptococcaceae, Genus I. Streptococcus
  • Rurangirwa2000 - Streptococcus didelphis sp. nov., a streptococcus with marked catalase activity isolated from opossums (Didelphis virginiana) with suppurative dermatitis and liver fibrosis.
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    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR STREPTOCOCCUS DIDELPHIS
  • De2020 - Metagenomic analysis of gut microbiome and resistome of diarrheal fecal samples from Kolkata, India, reveals the core and variable microbiota including signatures of microbial dark matter.
  • Forster2019 - A human gut bacterial genome and culture collection for improved metagenomic analyses.
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    • Added: January 19, 2022