Streptococcus lactarius

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

Overview

  • Streptococcus lactarius is a Gram-positive, non-spore-forming, facultatively anaerobic, non-motile, coccus bacterium. Streptococcus lactarius is probably a rare gut coloniser. (Martin2011)



  • This organism has been recovered from breast milk from healthy test subjects. Pathogenicity status unknown, or very unlikely to be pathogenic. A possible gut commensal.
    • QUIRKS
  • Found in human breast milk (Jeurink2013). Probably a rare or transient gut inhabitant but has not been reported to have been isolated from faeces.
    • GENERAL CHARACTERISTICS (Martin2011);
    Character Response
  • Substrates hydrolysed or digested:
  • aesculin; hippurate;
  • H+
  • Acid from carbohydrates usually produced:
  • lactose; maltose; sucrose;
  • Active enzymes:
  • Ala-Phe-Pro arylamidase; alkaline phosphatase; arginine dihydrolase; β-galactosidase; β-glucosidase; Gly-Trp arylamidase;
    • SPECIAL FEATURES
    Character Response
  • ✗
  • VP test:
  • not active
  • Haemolysis:
  • alpha
  • ✗
  • Pigments:
  • not produced

    • 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 Pigment:  neg
    Health:  Unknown
    Source:  breast milk from healthy test subjects
    		Aesculin:  + Hippurate:  +
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Arabinose:  neg Ribose:  neg D-Tagatose:  neg Lactose:  + Maltose:  + Melezitose:  neg Melibiose:  neg Sucrose:  + Trehalose:  neg Glycogen:  neg D-Arabitol:  neg Mannitol:  neg Sorbitol:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Ac-β-glcamnd:  neg α-Galactosidase:  neg β-Galactosidase:  + β-Glucosidase:  + β-Glucuronidase:  neg β-Mannosidase:  neg ArgDH:  + AlaPheProAA:  + GlyTrpAA:  + PyrrolidAA:  neg AlkalineP:  +
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		Pigment:  neg

    References

    SPECIFIC REFERENCES FOR STREPTOCOCCUS LACTARIUS
  • Martin2011 - Streptococcus lactarius sp. nov., isolated from breast milk of healthy women.
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    • Added: October 04, 2023