Acinetobacter septicus

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

Overview

  • Acinetobacter septicus is a Gram-negative, non-spore-forming, strictly aerobic, non-motile, coccobacillus bacterium. It has been detected in at least 2 gut microbiome compilation studies or metastudies. Acinetobacter septicus is likely to be transient and not a long-term gut coloniser. (Kilic2008)



  • This organism has been recovered from clinical sources (ulcers, blood) and human faeces. It is an opportunistic pathogen. Likely to be transient and not a long-term gut commensal.
    • QUIRKS
  • Obligate aerobe; unlikely to be a gut coloniser.
    • GENERAL CHARACTERISTICS (Kilic2008);
    Character Response
  • Substrates hydrolysed or digested:
  • urea;
  • 🌡
  • Temperature tolerance:
  • grows at 25℃; grows at 37℃; grows weakly at 41(neg) 44℃;
  • ⥅
  • Substrates assimilated or utilised:
  • ethanol; aspartate; glutamate; acetate; azelate; benzoate; glutarate; 4-hydroxybenzoate; DL-lactate; glutamine; D-malate;
  • ±
  • Strain-dependent substrate utilisation:
  • β-alanine; adipate; L-tartrate;
  • Active enzymes:
  • catalase;
    • SPECIAL FEATURES (Kilic2008);
    Character Response
  • ✗
  • Metabolites not produced:
  • H₂S; indole;
  • ✓
  • Haemolysis:
  • present
  • ✗
  • Nitrate:
  • not reduced
    • RESPONSE TO ANTIBIOTICS (Kilic2008);
    Class Active Resistant
  • Penicillins:
  • ampicillin-sulbactam; imipenem; meropenem; piperacillin-tazobactam;
  • Cephalosporins:
  • cefepime;
  • cefotaxime; ceftazidime;
  • Quinolines:
  • ciprofloxacin;
  • Aminoglycosides:
  • amikacin; gentamicin;
  • Heterocycles:
  • trimethoprim-sulfamethoxazole;
  • NOTES

    Description of Acinetobacter seifertii sp. nov.
    Acinetobacter seifertii (sei.fer9ti.i. N.L. gen. masc. n. seifertii of Seifert, named after Harald Seifert, a German medical microbiologist).
    Phenotypic characteristics correspond to those of the genus (Baumann et al., 1968), i.e. Gram-negative, strictly aerobic,
    oxidase-negative, catalase-positive coccobacilli, incapable of swimming motility, capable of growing in mineral media with acetate as the sole carbon source and ammonia as the sole source of nitrogen, and incapable of dissimilative denitrification.

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Proteobacteria Class:  Gammaproteobacteria Order:  Pseudomonadales Family:  Moraxellaceae Genus:  Acinetobacter Gram stain:  neg O2 Relation.:  strictly aerobic Spore:  No spore Motility:  Sessile Morphology:  Coccobacillus
    Health:  Unknown
    Source:  clinical sources (ulcers, blood) and human faeces
    Lower T(℃):  25(+)
    Mid T(℃):  37(+)
    High T(℃):  41(neg) 44(w)
    		Aesculin:  neg Urea:  + Gelatin:  neg
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Glucose:  neg
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    L-Arabinose:  neg Glucose:  neg Ribose:  neg Ethanol:  + Gluconate:  neg β-Ala:  d 4-Aminobutyrate:  neg Arg:  neg Asp:  + Glu:  + Histamine:  neg His:  neg Leu:  neg Orn:  neg Phe:  neg Trigonelline:  neg Acetate:  + Aconitate:  trans(neg) Adipate:  d Azelate:  + Benzoate:  + Citraconate:  neg Citrate:  neg Glutarate:  + 4-Hydroxybenzoate:  + DL-Lactate:  + Levulinate:  neg Malonate:  neg Phenylacetate:  neg L-Tartrate:  d
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Oxidase:  neg Catalase:  + Urease:  neg β-Galactosidase:  neg ArgDH:  neg
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		H2S:  neg Indole:  neg
    ANTIBIOTICS ℞
    Penicillins & Penems (μg/mL) Cephalosporins (μg/mL) Aminoglycosides (μg/mL) Macrolides (μg/mL) Quinolones (μg/mL)
    amp-sulb:  Sens
    piper-taz:  Sens
    imipenem:  Sens
    meropenem:  Sens
    cefepime:  Sens
    cefotaxime:  Res
    ceftazidime:  Res
    amikacin:  Sens
    gentamicin:  Sens
    ciprofloxacin:  Sens
    Tetracyclines (μg/mL) Vancomycin Class (μg/mL) Polypep/ketides (μg/mL) Heterocycles (μg/mL) Other (μg/mL)
    SXT:  Sens

    References

    SPECIFIC REFERENCES FOR ACINETOBACTER SEPTICUS
  • Kilic2008 - Acinetobacter septicus sp. nov. Association with a Nosocomial Outbreak of Bacteremia in a Neonatal Intensive Care Unit.
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR ACINETOBACTER SEPTICUS
  • Lagier2016 - Culture of previously uncultured members of the human gut microbiota by culturomics.
  • RajilicStojanovic2014 - The first 1000 cultured species of the human gastrointestinal microbiota.
  • ...............................
    • Added: April 08, 2021