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Related Concept Videos

Drugs for Treatment of Crohn's Disease in IBD Using Immunomodulatory Agents01:29

Drugs for Treatment of Crohn's Disease in IBD Using Immunomodulatory Agents

Crohn's disease is an inflammatory bowel disorder marked by chronic inflammation of the GI tract. Various treatment strategies for Crohn's disease are employed, such as immunomodulatory agents, glucocorticoids, and biologics or anti-TNF therapy. Azathioprine (Imuran), a commonly used immunomodulatory drug for Crohn's disease, is converted in the body to mercaptopurine, which inhibits purine biosynthesis and cell proliferation. Both are utilized in severe cases of Inflammatory Bowel Disease...
Drugs for Treatment of Crohn's Disease in IBD Using Biologic Agents: Anti-TNF01:24

Drugs for Treatment of Crohn's Disease in IBD Using Biologic Agents: Anti-TNF

Tumor Necrosis Factor (TNF), a proinflammatory cytokine, contributes significantly to the inflammation seen in Crohn's disease. It exists as soluble TNF and membrane-bound TNF, with actions mediated through TNF receptors (TNFR). TNFR activation leads to the release of proinflammatory cytokines, T-cell activation, collagen production, and leukocyte migration, all contributing to inflammation in Crohn's disease. Anti-TNF monoclonal antibodies, namely infliximab (Remicade), adalimumab (Humira),...
Drugs for Treatment of Crohn's Disease in IBD Using Glucocorticoids01:21

Drugs for Treatment of Crohn's Disease in IBD Using Glucocorticoids

Glucocorticoids, a class of anti-inflammatory drugs, are pivotal in treating moderate to severe Crohn's disease by inducing remission. They exhibit their anti-inflammatory action by inhibiting the production of inflammatory cytokines such as tumor necrosis factor (TNF)-α, interleukin (IL)-1, and chemokines like IL-8. In addition, they reduce the expression of inflammatory cell adhesion molecules and inhibit gene transcription of nitric oxide synthase, phospholipase A2, cyclooxygenase-2 (COX-2),...
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 III: Crohn's Disease01:25

Inflammatory Bowel Disease III: Crohn's Disease

Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...
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: Jul 11, 2026

Fecal Microbiota Transplantation via Colonoscopy for Recurrent C. difficile Infection
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Published on: December 8, 2014

Actinomycosis complicating Crohn's disease

P N Manley, R Dhru

    Gastroenterology
    |November 1, 1980
    PubMed
    Summary

    A case report details a secondary Actinomyces infection in Crohn's disease. Differentiating these conditions requires careful histopathological examination for specific features like sulfur granules.

    Area of Science:

    • Gastroenterology
    • Infectious Diseases
    • Microbiology

    Background:

    • Crohn's disease is a chronic inflammatory bowel disease.
    • Actinomycosis is a bacterial infection often caused by Actinomyces species.
    • Differentiating these conditions can be clinically challenging.

    Observation:

    • A case of secondary Actinomyces infection complicating Crohn's disease is presented.
    • Clinical presentation of Crohn's disease and actinomycosis can overlap significantly.
    • Histopathological examination revealed key features distinguishing secondary actinomycosis.

    Findings:

    • Distinguishing features of secondary actinomycosis include multiloculated abscesses, sulfur granules, and characteristic Gram stain findings of the organisms.
    • Necrotizing granulomata are rarely observed.

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  • Actinomyces organisms were identified, necessitating specific diagnostic considerations.
  • Implications:

    • Accurate diagnosis is crucial as actinomycosis is treatable with surgery and/or antibiotics.
    • A high index of suspicion for Actinomyces is warranted in Crohn's disease patients presenting with abscesses.
    • Diagnostic recommendations include a thorough search for Actinomyces, incorporating anaerobic cultures.