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Related Experiment Video

Updated: May 31, 2026

Chronic Salmonella Infection Induced Intestinal Fibrosis

Chronic Salmonella Infection Induced Intestinal Fibrosis

Published on: September 22, 2019

Bacteria as trigger for chronic gastrointestinal disorders.

Philippe Marteau¹, Ulriikka Chaput

¹AP-HP, Lariboisière Hospital, Department of Digestive Diseases, Paris 7 University, Paris, France. philippe.marteau@lrb.aphp.fr

Digestive Diseases (Basel, Switzerland)

|July 8, 2011

Summary

Microorganisms can cause chronic gastrointestinal inflammation, leading to cell proliferation and diseases like cancer. Understanding gut microbiota through metagenomics and metabolomics offers new insights into conditions such as irritable bowel syndrome and obesity.

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Area of Science:

Microbiology
Gastroenterology
Oncology

Background:

Microorganisms can trigger chronic inflammation and cell proliferation in the gastrointestinal tract, potentially leading to cancer.
Specific bacteria like Helicobacter pylori are implicated in gastric adenocarcinoma and lymphoma development.
Dysbiosis, an imbalance in gut microbiota, is frequently observed in inflammatory bowel diseases.

Purpose of the Study:

To explore the role of microorganisms in chronic gastrointestinal diseases, including cancer and inflammatory conditions.
To discuss the mechanisms of microbial-induced carcinogenesis and lymphoma genesis.
To highlight the potential of new tools like metagenomics and metabolomics in understanding gastrointestinal ecosystems.

Main Methods:

Review of existing literature on microbial involvement in gastrointestinal diseases.
Analysis of factors contributing to microbial carcinogenesis and lymphoma.
Discussion of diagnostic markers and prognostic indicators in inflammatory bowel disease.

Main Results:

Helicobacter pylori is linked to gastric adenocarcinoma and lymphoma, with a multi-step carcinogenic process involving host, environment, and bacterial factors.
Campylobacter jejuni plays a role in immunoproliferative small bowel disease, potentially curable by eradication.
Dysbiosis, characterized by instability and reduced biodiversity (e.g., decreased Faecalibacterium prausnitzii), is a hallmark of inflammatory bowel disease.

Conclusions:

Microbial infections and dysbiosis are significant factors in the pathogenesis of various gastrointestinal diseases, including cancers and inflammatory conditions.
Early eradication of certain bacteria can be curative for specific lymphomas.
Advanced tools like metagenomics and metabolomics are crucial for future research in gastrointestinal health, focusing on IBS, colon cancer, and obesity.