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Related Concept Videos

Inflammatory Bowel Disease II: Ulcerative Colitis01:20

Inflammatory Bowel Disease II: Ulcerative Colitis

Ulcerative colitis is a chronic inflammatory disorder of the colon characterized by continuous mucosal inflammation that typically begins in the rectum and extends proximally in a uniform pattern. Its pathogenesis involves a complex interplay of genetic predisposition, immune dysregulation, and environmental influences. These factors converge to impair the colon’s epithelial defenses and promote an exaggerated inflammatory response against luminal contents.Breakdown of the Mucosal BarrierA...
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...
Bacterial Gastroenteritis01:18

Bacterial Gastroenteritis

Bacterial gastroenteritis, characterized by diarrhea, abdominal cramps, and vomiting, is often caused by ingestion of contaminated food or water and is frequently associated with pathogenic Escherichia coli strains. These microbes exploit two principal mechanisms to inflict disease.Shiga toxin–producing E. coli, also referred to as STEC—notably O157:H7—release Shiga toxins that target ribosomes, blocking protein synthesis. The B subunit of the toxin binds the host glycolipid receptor...
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...
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 IV: Clinical Manifestations01:20

Inflammatory Bowel Disease IV: Clinical Manifestations

Inflammatory bowel disease (IBD) encompasses two major chronic disorders—ulcerative colitis and Crohn’s disease—each characterized by relapsing episodes of gastrointestinal inflammation. Although they share certain clinical features, their patterns of involvement and manifestations differ in ways that aid diagnosis and guide management.Ulcerative ColitisUlcerative colitis is limited to the colon and rectum and involves continuous inflammation of the mucosal layer. The disease course is marked...

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Related Experiment Video

Updated: May 29, 2026

Investigating the Alleviating Effects of Bacillus cereus Administration on Colitis through Gut Microbiota Modulation
08:34

Investigating the Alleviating Effects of Bacillus cereus Administration on Colitis through Gut Microbiota Modulation

Published on: July 27, 2022

[Bacterial colitis].

G B Baretton1, D E Aust

  • 1Institut für Pathologie, Universitätsklinikum Carl Gustav Carus der TU Dresden, Fetscherstr. 74, 01307, Dresden, Deutschland.

Der Pathologe
|September 22, 2011
PubMed
Summary
This summary is machine-generated.

This review focuses on identifying colorectal inflammation in biopsies and differentiating its causes. It details the pathomorphology and diagnosis of common bacterial colitis forms.

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The Citrobacter rodentium Mouse Model: Studying Pathogen and Host Contributions to Infectious Colitis
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Induction of Intestinal Inflammation by Adoptive Transfer of CBir1 TCR Transgenic CD4+ T Cells to Immunodeficient Mice
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Induction of Intestinal Inflammation by Adoptive Transfer of CBir1 TCR Transgenic CD4+ T Cells to Immunodeficient Mice

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Investigating the Alleviating Effects of Bacillus cereus Administration on Colitis through Gut Microbiota Modulation
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Induction of Intestinal Inflammation by Adoptive Transfer of CBir1 TCR Transgenic CD4+ T Cells to Immunodeficient Mice
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Induction of Intestinal Inflammation by Adoptive Transfer of CBir1 TCR Transgenic CD4+ T Cells to Immunodeficient Mice

Published on: December 16, 2021

Area of Science:

  • Gastroenterology and Pathology
  • Colorectal Histopathology

Context:

  • Assessing colorectal biopsy specimens for inflammation is crucial, especially with symptoms like diarrhea or endoscopic findings of mucosal redness.
  • Distinguishing between infectious and non-infectious etiologies of colorectal inflammation is a key diagnostic challenge.

Purpose:

  • To discuss the pathomorphology and differential diagnosis of significant bacterial colitis forms.
  • To guide pathologists in identifying and classifying inflammatory changes in colorectal mucosa.

Summary:

  • Inflammation in colorectal biopsies is diagnosed by increased inflammatory infiltrate in the mucosa.
  • Morphological hallmarks aid in diagnosing specific colitis types (e.g., lymphocytic, collagenous), while others present patterns requiring further etiological investigation.
  • This article specifically addresses the pathological features and differential diagnosis of common bacterial colitis.

Impact:

  • Enhances diagnostic accuracy for colorectal inflammation.
  • Provides a framework for differentiating bacterial colitis from other inflammatory conditions.
  • Supports clinical decision-making in managing patients with colorectal symptoms.