Prevotella oulorum

(aka Bacteroides oulorum)

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

Overview

  • Prevotella oulorum, (aka Bacteroides oulorum), is a Gram-negative, non-spore-forming, strictly anaerobic, non-motile, rod-shaped bacterium. It has been detected in at least 5 gut microbiome compilation studies or metastudies. The DNA G+C content is 45-46%. Prevotella oulorum is probably a rare gut coloniser. (Shah1985)



  • This organism has been recovered from human faeces, dental disease, and oral flora. The risk classification (www.baua.de) for this organism is 1, i.e., low risk of infection and spread. Pathogenicity status unknown, or very unlikely to be pathogenic. A possible gut commensal.
    • GENERAL CHARACTERISTICS (Shah1985);
    Character Response
  • Substrates hydrolysed or digested:
  • aesculin;
  • 💧
  • Bile tolerance:
  • Doesn't tolerate 20% bile
  • H+
  • Acid from carbohydrates usually produced:
  • fructose; glucose; mannose; glycogen; inulin; starch; lactose; maltose; raffinose; sucrose;
  • Active enzymes:
  • fucosidase; β-glucosidase; G6PDH and 6PGDH;
    • SPECIAL FEATURES (Shah1985);
    Character Response
  • ✓
  • Metabolites produced:
  • acetate; succinate;
  • ✗
  • Metabolites not produced:
  • indole;
  • ✗
  • Pigments:
  • not produced

  • Prevotella species at mucosal sites to localized and systemic disease, including periodontitis, bacterial vaginosis, rheumatoid arthritis, metabolic disorders and low_grade systemic inflammation. Intriguingly, Prevotella abundance is reduced within the lung microbiota of patients with asthma and chronic obstructive pulmonary disease. Increased Prevotella abundance is associated with augmented T helper type 17 (Th17) _mediated mucosal inflammation, which is in line with the marked capacity of Prevotella in driving Th17 immune responses in vitro. Studies indicate that Prevotella predominantly activate Toll_like receptor 2, leading to production of Th17_polarizing cytokines by antigen_presenting cells, including interleukin_23 (IL_23) and IL_1. Furthermore, Prevotella stimulate epithelial cells to produce IL_8, IL_6 and CCL20, which can promote mucosal Th17 immune responses and neutrophil recruitment. Prevotella_mediated mucosal inflammation leads to systemic dissemination of inflammatory mediators, bacteria and bacterial products, which in turn may affect systemic disease outcomes. [PMID: 28542929]

  • GutFeeling KnowledgeBase COMMENTS [Website]

    Prevotella species are anaerobic Gram_negative bacteria of the Bacteroidetes phylum, which also includes the clinically important genera Bacteroides and Porphyromonas. Prevotella strains are classically considered commensal bacteria due to their extensive presence in the healthy human body and their rare involvement in infections. Only a few strains have been reported to give rise to opportunistic endogenous infections, including chronic infections, abscesses and anaerobic pneumonia. [PMID: 28542929]

  • Bik, E. M., Eckburg, P. B., Gill, S. R., Nelson, K. E., Purdom, E. A., Francois, F., Perez-Perez, G., Blaser, M. J., & Relman, D. A. (2006). Molecular analysis of the bacterial microbiota in the human stomach. Proceedings of the National Academy of Sciences of the United States of America, 103(3), 732–737.

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Bacteroidetes Class:  Bacteroidia Order:  Bacteroidales Family:  Prevotellaceae Genus:  Prevotella Alt. name:  Bacteroides oulorum Gram stain:  neg O2 Relation.:  strictly anaerobic Spore:  No spore Motility:  Sessile Morphology:  Rod Pigment:  neg
    Health:  Unknown
    Source:  human faeces, dental disease, and oral flora
    DNA G+C(%):  45-46
    Bile reaction(%):  20(neg)
    		Aesculin:  + Gelatin:  neg
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Arabinose:  neg D-Arabinose:  neg Fructose:  + Glucose:  + Mannose:  + Rhamnose:  neg Xylose:  neg Cellubiose:  neg Lactose:  + Maltose:  + Melezitose:  neg Sucrose:  + Trehalose:  neg Glycogen:  + Inulin:  + Starch:  + Xylan:  neg Glycerol:  neg Mannitol:  neg Sorbitol:  neg Salicin:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    G6PDH6PGDH:  + α-Fucosidase:  + β-Glucosidase:  + Xylosidase:  neg GlyAP:  neg
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		Acetate:  + Succinate:  + Indole:  neg Pigment:  neg

    References

    SPECIFIC REFERENCES FOR PREVOTELLA OULORUM
  • Finegold2010 - Pyrosequencing study of fecal microflora of autistic and control children
  • Shah1985 - Bacteroides oulorum sp. nov., a Nonpigmented Saccharolytic Species from the Oral Cavity.
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR PREVOTELLA OULORUM
  • Bik2006 - Molecular analysis of the bacterial microbiota in the human stomach.
  • Byrd2020 - Stability and dynamics of the human gut microbiome and its association with systemic immune traits.
  • RajilicStojanovic2014 - The first 1000 cultured species of the human gastrointestinal microbiota.
  • Zupancic2012 - Analysis of the Gut Microbiota in the Old Order Amish and Its Relation to the Metabolic Syndrome.
  • ...............................
    • Added: April 08, 2021