Actinomyces ihuae

(aka Actinomyces ihumii)

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

Overview

  • Actinomyces ihuae, (aka Actinomyces ihumii), is a Gram-positive, non-spore-forming, aerobic, non-motile, rod-shaped bacterium. It has been detected in at least 1 gut microbiome compilation study or metastudy. Actinomyces ihuae is probably a rare gut coloniser. (Fonkou2018)



  • This organism has been recovered from stool sample of an HIV-infected man, France. Pathogenicity status unknown, or very unlikely to be pathogenic. A possible gut commensal.
    • GENERAL CHARACTERISTICS (Fonkou2018);
    Character Response
  • 🧂
  • Salt tolerance:
  • doesn't tolerate 10% salt;
  • pH
  • Acidity tolerance:
  • tolerates pH 5; tolerates pH 8.0;
  • 🌡
  • Temperature tolerance:
  • Grows optimally at 37℃.
  • H+
  • Acid from carbohydrates usually produced:
  • mannose; lactose; sucrose;
  • Active enzymes:
  • β-galactosidase;
    • SPECIAL FEATURES (Fonkou2018);
    Character Response
  • ✗
  • Nitrate:
  • not reduced
    • RESPONSE TO ANTIBIOTICS (Fonkou2018);
    Class Active Resistant
  • Penicillins:
  • amoxicillin; amoxicillin-clavulanic acid; imipenem;
  • Macrolides:
  • erythromycin;
  • Tetracyclines:
  • doxycycline;
  • Aminoglycosides:
  • gentamicin-500;
  • gentamicin; tobramycin;
  • Polypep/ketides:
  • rifampicin;
  • Heterocycles:
  • fosfomycin; metronidazole; trimethoprim-sulfamethoxazole;
  • Vancomycins:
  • vancomycin;
  • Miscellaneous antibiotics:
  • clindamycin;
  • colistin;

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Actinobacteria Class:  Actinomycetia Order:  Actinomycetales Family:  Actinomycetaceae Genus:  Actinomyces Alt. name:  Actinomyces ihumii Gram stain:  + O2 Relation.:  aerobic Spore:  No spore Motility:  Sessile Morphology:  Rod
    Health:  Unknown
    Source:  stool sample of an HIV-infected man, France
    Opt. T:  37℃
    NaCl >6%:  10(neg)
    pH 4.2-5.9:  5(+)
    pH 6.0-8.0:  8.0(+)
    		Urea:  neg
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    L-Arabinose:  neg Fructose:  neg Glucose:  neg Mannose:  + Ribose:  neg Lactose:  + Maltose:  neg Sucrose:  + Mannitol:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  neg Catalase:  neg Urease:  neg β-Galactosidase:  + AlkalineP:  neg
    ANTIBIOTICS ℞
    Penicillins & Penems (μg/mL) Cephalosporins (μg/mL) Aminoglycosides (μg/mL) Macrolides (μg/mL) Quinolones (μg/mL)
    amoxicillin:  S(25; disc)
    Augmentin:  S(30; disc)
    penicillin_G:  Var(MIC50): 10U), MIC90: Var(10U
    imipenem:  S(10; disc)
    gentamicin:  R(15; disc)
    gentamicin-500:  S(500; disc)
    tobramycin:  R(10; disc)
    erythromycin:  R(15U)
    Tetracyclines (μg/mL) Vancomycin Class (μg/mL) Polypep/ketides (μg/mL) Heterocycles (μg/mL) Other (μg/mL)
    doxycycline:  S(30U)
    vancomycin:  S(30; disc)
    rifampicin:  S(30; disc)
    fosfomycin:  R(50; disc)
    metronidazole:  R(4; disc)
    SXT:  R(25; disc)
    clindamycin:  S(15; disc)
    colistin:  R(50; disc)

    References

    SPECIFIC REFERENCES FOR ACTINOMYCES IHUAE
  • Fonkou2018 - Non-contiguous finished genome sequences and descriptions of Actinomyces ihuae, Actinomyces bouchesdurhonensis, Actinomyces urinae, Actinomyces marseillensis, Actinomyces mediterranea and Actinomyces oralis sp. nov. identified by culturomics.
  • Ndongo2016f - "Actinomyces ihumii," a new bacterial species isolated from the digestive microbiota of a HIV-infected patient.
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    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR ACTINOMYCES IHUAE
  • Lagier2016 - Culture of previously uncultured members of the human gut microbiota by culturomics.
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    • Added: January 14, 2022