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Related Experiment Videos

The faecal flora in ulcerative colitis

J A van der Wiel-Korstanje, K C Winkler

    Journal of Medical Microbiology
    |November 1, 1975
    PubMed
    Summary

    Patients with ulcerative colitis have increased gut bacteria, specifically group-D streptococci, and reduced bifidobacteria. These bacteria break down mucin and hyaluronic acid, potentially causing high lactic acid levels in colitis patients.

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    Area of Science:

    • Microbiology
    • Gastroenterology
    • Human Gut Microbiome Research

    Background:

    • Ulcerative colitis (UC) is characterized by gut inflammation and dysbiosis.
    • Faecal flora analysis reveals significant differences between healthy individuals and UC patients.

    Purpose of the Study:

    • To investigate the specific microbial changes in the faecal flora of ulcerative colitis patients.
    • To explore the functional capabilities of these altered microbial communities, particularly in relation to mucin and hyaluronic acid breakdown.

    Main Methods:

    • Differential faecal flora counts were performed on samples from UC patients and healthy controls.
    • Microbial strains were isolated and their enzymatic activities (mucin and hyaluronic acid breakdown) were assessed.

    Main Results:

    • UC patients exhibited a 100-fold increase in group-D streptococci and a reduction in bifidobacteria compared to healthy subjects.
    • An increased variety of enterococci was observed in UC patients.
    • Strains from UC patients demonstrated enhanced mucin breakdown and were uniquely capable of hyaluronic acid degradation.
    • These substrates can be fermented to produce lactic acid.

    Conclusions:

    • The faecal flora in ulcerative colitis is characterized by a dysbiotic state with an overgrowth of specific streptococcal and enterococcal strains.
    • The enhanced ability of these bacteria to degrade mucin and hyaluronic acid may contribute to the high lactic acid levels observed in UC patients.
    • These findings suggest a potential role for these microbial activities in the pathogenesis or exacerbation of ulcerative colitis.

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