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Related Experiment Videos

Search for enteric microbial pathogens in patients with ulcerative colitis.

W J Brown1, M J Hudson, S Patrick

  • 1Public Health Laboratory, Odstock Hospital, Salisbury, UK.

Digestion
|January 1, 1992
PubMed
Summary

Enteric infections are uncommon in active ulcerative colitis (UC) patients. While initial bacterial pathogens were rare, some patients developed secondary colonisation resistance loss during treatment.

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Area of Science:

  • Gastroenterology
  • Microbiology
  • Immunology

Background:

  • Ulcerative colitis (UC) is a chronic inflammatory bowel disease.
  • The role of enteric pathogens in active UC is not fully understood.
  • Assessing microbial changes during UC treatment is crucial.

Purpose of the Study:

  • To investigate the prevalence of microbial pathogens in patients with active ulcerative colitis.
  • To evaluate changes in fecal microbiota and colonisation resistance following treatment.
  • To identify potential risk factors or indicators associated with UC exacerbation or treatment response.

Main Methods:

  • Faecal samples were collected from 64 UC patients during their first episode and 30 with chronic relapse at presentation.
  • Samples were re-collected after 3 months of treatment for follow-up analysis.

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  • Microbial pathogens, including bacteria, fungi, and parasites, were identified.
  • Colonisation resistance was assessed by the presence of specific microorganisms like beta-haemolytic streptococci, Staphylococcus aureus, Candida, and Clostridium difficile.
  • Cytotoxic activity in faeces was also measured.

    • Main Results:

    • Bacterial pathogens were not detected in most patients at presentation.
    • One patient presented with cryptosporidiosis.
    • Ten patients showed a loss of colonisation resistance during or after treatment, with opportunistic microorganisms detected.
    • Unidentified cytotoxic activity was present in 4 patients initially and 2 post-treatment.
    • Enteric infection was an uncommon finding in active UC.

    Conclusions:

    • Enteric infections are infrequently identified in patients presenting with active ulcerative colitis.
    • Treatment for ulcerative colitis may, in some cases, compromise colonisation resistance.
    • Further research is needed to understand the implications of opportunistic microbial colonisation in UC patients.