Citrobacter rodentium Infection Model for the Analysis of Bacterial Pathogenesis and Mucosal Immunology

Catherine L Kennedy1, Elizabeth L Hartland2,3,4

  • 1Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia.

Insights

Citrobacter rodentium is a mouse pathogen causing colon inflammation. This infection model is crucial for studying enteric diseases and immune responses, mimicking human inflammatory bowel diseases.

Area of Science:

  • Microbiology
  • Immunology
  • Pathogenesis

Background:

  • Citrobacter rodentium is a natural mouse pathogen causing transmissible colonic hyperplasia.
  • It induces colon thickening and inflammation, serving as a valuable research model.
  • The pathogen was first isolated from laboratory mouse colonies.

Purpose of the Study:

  • To investigate the pathogenesis of enteric disease using the C. rodentium model.
  • To understand the mucosal immune response to bacterial infection.
  • To explore parallels between C. rodentium infection and human inflammatory bowel diseases.

Main Methods:

  • Utilizing the C. rodentium infection model in mice.
  • Observing and analyzing colonic hyperplasia, inflammation, and dysbiosis.
  • Comparing disease features to human inflammatory bowel diseases.

Main Results:

  • The C. rodentium model effectively replicates key features of enteric disease.
  • It allows detailed study of the host's mucosal immune response.
  • Disease characteristics like inflammation and dysbiosis mirror aspects of human IBD.

Conclusions:

  • The C. rodentium infection model is essential for advancing our knowledge of enteric disease.
  • It provides critical insights into mucosal immunology and inflammatory processes.
  • This model aids research into inflammatory bowel diseases.

Related Concept Videos

Immunological Memory01:23

Immunological Memory

Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
17.1K
Mucosal Barrier of the Stomach01:25

Mucosal Barrier of the Stomach

The gastric glands contain parietal cells that secrete hydrochloric acid (HCl) for digestion. The cells secrete HCl because it is highly corrosive and essential for breaking down food. To achieve this, they secrete hydrogen and chloride ions into the lumen of the gastric glands, which combine to form HCl.
Within parietal cells, carbonic acid is first formed through the reaction of water and carbon dioxide. The dissociation of carbonic acid releases bicarbonate and hydrogen ions. The bicarbonate...
2.5K
Pulmonary Hypertension: Classification and Pathogenesis01:30

Pulmonary Hypertension: Classification and Pathogenesis

Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
There are various classifications for PH, each relating to different underlying causes and also...
673
Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
1.4K
Cystic Fibrosis: Pathogenesis01:23

Cystic Fibrosis: Pathogenesis

Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
896
COPD: Pathogenesis and Clinical Features01:20

COPD: Pathogenesis and Clinical Features

Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
1.9K