Aeromonas encheleia

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

Overview

  • Aeromonas encheleia is a Gram-negative, non-spore-forming, facultatively anaerobic, motile, rod-shaped bacterium. It has been detected in at least 1 gut microbiome compilation study or metastudy. The DNA G+C content is 59.4-60.8%. Aeromonas encheleia is likely to be transient and not a long-term gut coloniser. (Esteve1995; Huys1997)



  • This organism has been recovered from freshwater eels. The risk classification (www.baua.de) for this organism is 1, i.e., low risk of infection and spread (notes: human and animal pathogen; opportunistic in immunocompromised patients). Is a known human pathogen. Likely to be transient and not a long-term gut commensal.
    • QUIRKS
  • Borderline cold mesophile, with optimum growth temp of 28C. Unlikely gut coloniser.
    • GENERAL CHARACTERISTICS (Esteve1995); (Huys1997);
    Character Response
  • Substrates hydrolysed or digested:
  • aesculin; casein; chitin; DNA; starch;
  • ±
  • Strain-dependent hydrolysis or digestion:
  • gelatin;
  • 🧂
  • Salt tolerance:
  • tolerates 0% salt; tolerates 3% salt;
  • 🌡
  • Temperature tolerance:
  • grows at 4℃; grows at 37℃; Grows optimally at 28℃.
  • H+
  • Acid from carbohydrates usually produced:
  • glucose; rhamnose; maltose; sucrose; trehalose; mannitol; salicin;
  • ±
  • Strain-dependent acid from carbs:
  • glycerol;
  • ⥅
  • Substrates assimilated or utilised:
  • maltose; mannitol; mannose; salicin; sucrose; trehalose; histidine; proline; serine; acetate; fumarate; L-malate;
  • ±
  • Strain-dependent substrate utilisation:
  • galactose; glycerol; γ-aminobutyrate; glutamate; succinate; glutamine;
  • Active enzymes:
  • arginine dihydrolase; catalase; DNase; β-galactosidase; oxidase;
    • SPECIAL FEATURES (Esteve1995); (Huys1997);
    Character Response
  • ✓
  • Metabolites produced:
  • indole;
  • ✗
  • Metabolites not produced:
  • H₂S;
  • ±
  • VP test:
  • active for a few strains
  • ✓
  • ONPG test:
  • active
  • ✓
  • Haemolysis:
  • present
  • ✓
  • NO3➔NO2:
  • reduced
  • ✗
  • Thiosulfate:
  • not reduced
    • RESPONSE TO ANTIBIOTICS (Huys1997);
    Class Active Resistant
  • Penicillins:
  • mezlocillin; piperacillin;
  • amoxicillin; ampicillin; carbenicillin; oxacillin; penicillin G;
  • Cephalosporins:
  • cefotaxime; ceftazidime;
  • Tetracyclines:
  • tetracycline;
  • Aminoglycosides:
  • amikacin; gentamicin; kanamycin; netilmycin; spectinomycin; tobramycin;
  • Heterocycles:
  • chloramphenicol; trimethoprim;
  • Vancomycins:
  • vancomycin; teicoplanin;

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Proteobacteria Class:  Gammaproteobacteria Order:  Aeromonadales Family:  Aeromonadaceae Genus:  Aeromonas Gram stain:  neg O2 Relation.:  facultatively anaerobic Spore:  No spore Motility:  Swimming Morphology:  Rod
    Health:  Unknown
    Source:  freshwater eels
    DNA G+C(%):  59.4-60.8
    Opt. T:  28℃
    Low T(℃):  4(+)
    Mid T(℃):  37(+)
    NaCl 0.5-2%:  0(+)
    NaCl 3-5%:  3(+)
    		Aesculin:  + Urea:  neg Gelatin:  d Starch:  d(+) Casein:  + Chitin:  + DNA:  + Tween:  80(+)
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    L-Arabinose:  neg Glucose:  + Rhamnose:  d(+) Xylose:  neg Cellubiose:  neg Lactose:  neg Maltose:  + Melibiose:  neg Sucrose:  d(+) Trehalose:  + Amygdalin:  neg D-Arabitol:  neg Dulcitol:  neg Erythritol:  neg Glycerol:  d(neg) Inositol:  neg Mannitol:  + Sorbitol:  neg Me-α-D-Glc:  neg 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 Galactose:  d(neg) Mannose:  + Rhamnose:  neg Cellubiose:  neg Lactose:  neg Maltose:  + Raffinose:  neg Sucrose:  + Trehalose:  + Erythritol:  neg Ethanol:  neg Gluconate:  neg Glycerol:  d Inositol:  neg Mannitol:  + Salicin:  + Ala:  neg 4-Aminobutyrate:  d(neg) Arg:  neg Asp:  neg L-Citrulline:  neg Glu:  d(neg) Gly:  neg His:  d(+) Leu:  neg Pro:  + Ser:  + Tyr:  neg Acetate:  + Citrate:  neg Fumarate:  + 3-Hydroxybutyrate:  neg L-Malate:  + Malonate:  neg Mucate:  neg Propionate:  neg Succinate:  d
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  + Catalase:  + Urease:  neg β-Galactosidase:  + ArgDH:  + LysDC:  neg OrnDC:  neg TrpAA:  neg DNAse:  + Esterase:  neg
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		H2S:  neg Indole:  +
    ANTIBIOTICS ℞
    Penicillins & Penems (μg/mL) Cephalosporins (μg/mL) Aminoglycosides (μg/mL) Macrolides (μg/mL) Quinolones (μg/mL)
    amoxicillin:  R(10; disc)
    ampicillin:  Res
    carbenicil:  R(30; disc)
    mezlocillin:  Sens
    oxacillin:  Res
    penicillin_G:  Res
    piperacillin:  Sens
    cefotaxime:  Sens
    ceftazidime:  Sens
    amikacin:  Sens
    gentamicin:  Sens
    kanamycin:  Sens
    netilmycin:  Sens
    spectinomycin:  Sens
    tobramycin:  Sens
    Tetracyclines (μg/mL) Vancomycin Class (μg/mL) Polypep/ketides (μg/mL) Heterocycles (μg/mL) Other (μg/mL)
    tetracycline:  Sens
    teicoplanin:  Res
    vancomycin:  Res
    chloramphenicol:  Sens
    trimethoprim:  Sens

    References

    SPECIFIC REFERENCES FOR AEROMONAS ENCHELEIA
  • Esteve1995 - Aeromonas encheleia sp. nov., isolated from European eels.
  • Huys1997 - Inclusion of Aeromonas DNA hybridization group 11 in Aeromonas encheleia and extended descriptions of the species Aeromonas eucrenophila and A. encheleia.
  • MartinezMurcia1999 - Phylogenetic positions of Aeromonas encheleia, Aeromonas popoffii, Aeromonas DNA hybridization group 11 and Aeromonas group 501.
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    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR AEROMONAS ENCHELEIA
  • Lagier2016 - Culture of previously uncultured members of the human gut microbiota by culturomics.
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    • Added: January 14, 2022