Related Experiment Video
Updated: Jul 20, 2026
12:58
A Protocol to Characterize the Morphological Changes of Clostridium difficile in Response to Antibiotic Treatment
Published on: May 25, 2017
Is Crohn's disease caused by antibiotics?
1Medical Clinic, University of Erlangen-Nürnber, Germany.
Hepato-Gastroenterology
|December 1, 1994
Summary
The rise in Clostridioides difficile (CD) infections correlates with increased antibiotic use. Antibiotics can alter gut bacteria, making them produce toxins or become invasive, leading to CD in susceptible individuals.
Area of Science:
- Microbiology
- Infectious Diseases
- Pharmacology
Background:
- The incidence of Clostridioides difficile (CD) infections has risen significantly over the past 50 years.
- This increase parallels the widespread use of antibiotics in both human and veterinary medicine.
Purpose of the Study:
- To investigate the link between antibiotic usage and the pathogenesis of Clostridioides difficile infections.
- To explore how antibiotic therapy may predispose individuals to CD.
Main Methods:
- Review of epidemiological data correlating antibiotic use and CD incidence.
- Analysis of bacterial response to sub-lethal antibiotic doses in vitro.
- Hypothesis formulation based on observed correlations and bacterial behavior.
Main Results:
- Insufficient antibiotic doses can enhance bacterial toxin production or invasiveness.
- A statistically significant association exists between prior antibiotic therapy and CD outbreaks.
- Altered biological properties of intestinal bacteria due to antibiotics are implicated in CD development.
Conclusions:
- Antibiotic use is a major contributing factor to the increasing prevalence of Clostridioides difficile.
- Altered gut microbiota, specifically changes in bacterial virulence factors induced by antibiotics, are key to CD pathogenesis in susceptible hosts.
Related Concept Videos
01:29Drugs 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...
01:24Drugs 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),...
01:30Inflammatory 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, 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...
01:18Dysbiosis 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...
01:21Microbiota Modulation by Antibiotics
Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...
01:25Inflammatory 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...