Rahnella aquatilis

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

Overview

  • Rahnella aquatilis is a Gram-negative, non-spore-forming, facultatively anaerobic, variably-motile, rod-shaped bacterium. It has been detected in at least 4 gut microbiome compilation studies or metastudies. The DNA G+C content is 51-56%. Rahnella aquatilis is likely to be transient and not a long-term gut coloniser. (Izard1979; Funke1995a; Kampfer2005aBergey)



  • This organism has been recovered from human faeces (CCUG) and clinical sources (blood, urine - CCUG). The risk classification (www.baua.de) for this organism is 1, i.e., low risk of infection and spread (notes: opportunistic in immunocompromised patients). Could be a possible pathogen in humans, but unknown at this stage. Likely to be transient and not a long-term gut commensal.
    • GENERAL CHARACTERISTICS (Izard1979); (Funke1995a); (Kampfer2005aBergey);
    Character Response
  • Substrates hydrolysed or digested:
  • aesculin; gelatin;
  • 🌡
  • Temperature tolerance:
  • grows at 4℃; grows at 25℃; Grows optimally at 37℃.
  • H+
  • Acid from carbohydrates usually produced:
  • L-arabinose; galactose; glucose; mannose; rhamnose; xylose; cellubiose; lactose; maltose; raffinose; sucrose; dulcitol; sorbitol; salicin;
  • ⥅
  • Substrates assimilated or utilised:
  • N-acetylglucosamine; L-arabinose; arbutin; cellubiose; fructose; galactose; gluconate; glucose; maltose; mannitol; mannose; melibiose; rhamnose; ribose; salicin; sorbitol; sucrose; trehalose; xylose; alanine; aspartate; serine; citrate; fumarate; L-malate; malonate; pyruvate;
  • ±
  • Strain-dependent substrate utilisation:
  • histidine; ornithine; proline; aconitate; mucate; D-tartrate;
  • Active enzymes:
  • alkaline phosphatase; acid phosphatase; catalase; β-glucosidase; glutamic acid decarboxylase; phenylalanine deaminase; xylosidase;
  • ±
  • Strain-dependent active enzymes:
  • α-glucosidase;
    • SPECIAL FEATURES (Funke1995a); (Kampfer2005aBergey);
    Character Response
  • ✗
  • Metabolites not produced:
  • H₂S; indole;
  • ✓
  • Methyl red test:
  • active
  • ✓
  • VP test:
  • active
  • KCN growth:
  • inhibited
  • ✓
  • NO3➔NO2:
  • reduced
  • ✗
  • Pigments:
  • not produced

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Proteobacteria Class:  Gammaproteobacteria Order:  Enterobacterales Family:  Yersiniaceae Genus:  Rahnella Gram stain:  neg O2 Relation.:  facultatively anaerobic Spore:  No spore Motility:  vr Morphology:  Rod Pigment:  neg
    Health:  Unknown
    Source:  human faeces (CCUG) and clinical sources (blood, urine - CCUG)
    DNA G+C(%):  51-56
    Opt. T:  37℃
    Low T(℃):  4(+)
    Lower T(℃):  25(+)
    		Aesculin:  + Gelatin:  + DNA:  neg Tween:  80(+)
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    L-Arabinose:  + Galactose:  + Glucose:  + Mannose:  + Rhamnose:  + Xylose:  + Cellubiose:  + Lactose:  + Maltose:  + Sucrose:  + Adonitol:  neg D-Arabitol:  neg Dulcitol:  d(+) Erythritol:  neg Glycerol:  neg Inositol:  neg Sorbitol:  + 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:  + Fructose:  + Galactose:  + Glucose:  + Mannose:  + Rhamnose:  + Ribose:  + Xylose:  + Cellubiose:  + Maltose:  + Melibiose:  + Sucrose:  + Trehalose:  + N_Acetyl_glucosamine:  + Adonitol:  neg Arbutin:  + Gluconate:  + Inositol:  neg Mannitol:  + Salicin:  + Sorbitol:  + Ala:  + β-Ala:  neg 4-Aminobutyrate:  neg Asp:  + His:  d Leu:  neg Orn:  d Phe:  neg Pro:  d Ser:  + Tyr:  neg Acetate:  neg Aconitate:  cis(d) trans(neg) Adipate:  neg Azelate:  neg Citrate:  w(+) Fumarate:  + Glutarate:  neg 3-Hydroxybutyrate:  neg 3-Hydroxybenzoate:  neg 4-Hydroxybenzoate:  neg L-Malate:  + Malonate:  + Mesaconate:  neg Mucate:  d Phenylacetate:  neg Propionate:  neg Pyruvate:  + Suberate:  neg D-Tartrate:  d
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  neg Catalase:  + Urease:  neg β-Galactosidase:  neg α-Glucosidase:  d β-Glucosidase:  + Xylosidase:  + ArgDH:  neg GluDC:  + LysDC:  neg OrnDC:  neg Phe deaminase:  w(+) TrpAA:  neg AlkalineP:  + AcidP:  +
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		H2S:  neg Indole:  neg Pigment:  neg

    References

    SPECIFIC REFERENCES FOR RAHNELLA AQUATILIS
  • Izard1979 - Rahnella aquatilis, nouveau membre de la famille des Enterobacteriaceae [Rahnella aquatilis, a new member of the Enterobacteriaceae (author's transl)].
  • Yuan2020 - The complete genome sequence of Rahnella aquatilis ZF7 reveals potential beneficial properties and stress tolerance capabilities.
  • Lee2019 - Bacteremia due to Rahnella aquatilis in a Patient with a Chemoport.
  • Kuzdan2015 - Rahnella aquatilis Sepsis in a Premature Newborn.
  • Roeder2021 - Septic Shock Caused by Rahnella aquatilis Bacteremia in an Immunocompetent Adult.
  • Funke1995a - Rahnella aquatilis bacteremia in an HIV-infected intravenous drug abuser.
  • Kampfer2005aBergey - Bergey's manual of systematic bacteriology. Vol. 2, The Gammaproteobacteria Part B. Family Enterobacteriaceae, Genus XXXI. Rahnella
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR RAHNELLA AQUATILIS
  • Byrd2020 - Stability and dynamics of the human gut microbiome and its association with systemic immune traits.
  • Yang2020 - Species-Level Analysis of Human Gut Microbiota With Metataxonomics.
  • Yang2020a - Establishing high-accuracy biomarkers for colorectal cancer by comparing fecal microbiomes in patients with healthy families
  • Zeller2014 - Potential of fecal microbiota for early-stage detection of colorectal cancer
  • ...............................
    • GENERAL REFERENCES FOR RAHNELLA AQUATILIS
  • CCUG - Culture Collection University of Gothenburg - Entire Collection
    • Added: October 27, 2021