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Related Concept Videos

Dysbiosis of the Gut Microbiota01:18

Dysbiosis of the Gut Microbiota

The human gut microbiome includes a diverse array of microbial species, including beneficial commensals and opportunistic pathogens, which interact to support host health. These microbes contribute to essential functions such as nutrient metabolism, immune system modulation, and maintenance of intestinal barrier integrity. However, disruptions to this equilibrium—referred to as dysbiosis—can have widespread physiological consequences.Dysbiosis is often characterized by reduced microbial...
Inflammatory Bowel Disease V: Surgical Management01:21

Inflammatory Bowel Disease V: Surgical Management

Surgical interventions for inflammatory bowel disease (IBD), which includes ulcerative colitis and Crohn's disease, are essential in managing symptoms and addressing complications. The selection of surgical procedures is contingent upon the specific conditions and complications that stem from these illnesses.
Here are some common surgical interventions for IBD:
Chronic Bowel Disorders: Introduction01:17

Chronic Bowel Disorders: Introduction

Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
Inflammatory Bowel Disease I: Introduction01:26

Inflammatory Bowel Disease I: Introduction

Inflammatory bowel disease is a group of chronic disorders marked by recurrent inflammation of the gastrointestinal tract due to an abnormal immune response against gut microflora. This leads to tissue damage. The two main forms are Crohn’s disease and ulcerative colitis.Crohn’s DiseaseCrohn’s disease is a relapsing inflammatory disorder that can affect any part of the GI tract, from the mouth to the anus. It involves all layers of the bowel wall (transmural) and shows “skip lesions” in which...
Inflammatory Bowel Disease II: Crohn's Disease01:30

Inflammatory Bowel Disease II: Crohn's Disease

Introduction
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
Crohn's disease
Crohn's disease is a chronic, systemic inflammatory bowel disease (IBD) that predominantly affects the gastrointestinal tract. It is marked by transmural...
Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...

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Related Experiment Video

Updated: Jul 19, 2026

A Rat Model of Pouchitis Following Proctocolectomy and Ileal Pouch-Anal Anastomosis Using Dextran Sulfate Sodium
04:05

A Rat Model of Pouchitis Following Proctocolectomy and Ileal Pouch-Anal Anastomosis Using Dextran Sulfate Sodium

Published on: May 31, 2024

Dysbiosis and pouchitis.

M Lim1, P Sagar, P Finan

  • 1Department of Colorectal Surgery, Leeds General Infirmary, Leeds, UK. mklim@Surgicalresearch.Fsnet.co.uk

The British Journal of Surgery
|October 24, 2006
PubMed
Summary

The evidence linking gut bacteria imbalance (dysbiosis) to pouchitis is weak. Further research is needed, but current data can help guide patient management strategies.

Area of Science:

  • Gastroenterology
  • Microbiology

Background:

  • Pouchitis etiology remains unclear, with a suggested link to gut dysbiosis.
  • Inflammatory bowel disease (IBD) management involves surgical interventions like ileal pouch-anal anastomosis (IPAA).

Purpose of the Study:

  • To review existing literature on the association between dysbiosis and pouchitis.
  • To evaluate the strength of evidence supporting dysbiosis as a cause of pouchitis.

Main Methods:

  • Retrospective review of 17 studies published between 1985 and 2005.
  • Literature search conducted across Medline, Pubmed, and Embase databases.

Main Results:

  • Significant heterogeneity in study methodologies was observed.
  • Vague diagnostic criteria in older studies complicate analysis and introduce uncertainty.

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Injections of Lipopolysaccharide into Mice to Mimic Entrance of Microbial-derived Products After Intestinal Barrier Breach

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Chronic Salmonella Infection Induced Intestinal Fibrosis
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Chronic Salmonella Infection Induced Intestinal Fibrosis

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A Rat Model of Pouchitis Following Proctocolectomy and Ileal Pouch-Anal Anastomosis Using Dextran Sulfate Sodium
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Injections of Lipopolysaccharide into Mice to Mimic Entrance of Microbial-derived Products After Intestinal Barrier Breach
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Chronic Salmonella Infection Induced Intestinal Fibrosis

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  • Patient misclassification issues were prevalent.

    • Conclusions:

    • Current evidence for dysbiosis causing pouchitis is limited.
    • An algorithm for pouchitis management can be developed from available data.
    • A structured approach is recommended for future research in this area.