Related Experiment Videos
Pathological changes in the rabbit ileal loop model caused by Campylobacter jejuni from human colitis
P H Everest1, H Goossens, P Sibbons
1Department of Genetics, University of Leicester.
Journal of Medical Microbiology
|May 1, 1993
Summary
Campylobacter jejuni causes severe intestinal damage and fluid secretion in rabbits, mimicking human inflammatory diarrhea. Impaired bacterial motility prevents these effects, suggesting motility is crucial for C. jejuni pathogenesis.
Area of Science:
- Microbiology
- Gastroenterology
- Pathogenesis
Background:
- Campylobacter jejuni is a leading cause of bacterial gastroenteritis worldwide.
- Inflammatory diarrhea involves significant intestinal tissue damage and fluid loss.
- The precise mechanisms of C. jejuni-induced intestinal damage and secretion remain incompletely understood.
Purpose of the Study:
- To investigate the pathogenic mechanisms of Campylobacter jejuni in a rabbit ileal loop model.
- To assess the role of bacterial factors and host responses in C. jejuni-induced enteritis.
Main Methods:
- Infection of rabbit ileal loops with clinical isolates of Campylobacter jejuni.
- Macroscopic and microscopic examination of ileal tissue damage.
- Analysis of loop fluids for protein, bicarbonate, and potential toxins.
- Assay of a C. jejuni mutant strain with impaired motility.
Main Results:
- Clinical C. jejuni strains induced severe inflammatory reactions and tissue damage in rabbit ileal loops.
- Leakage of hemoglobin and proteins into loop fluids indicated mucosal damage.
- Loop fluids showed active bicarbonate secretion, similar to cholera toxin effects.
- A C. jejuni mutant with reduced motility did not cause tissue damage or fluid secretion.
Conclusions:
- Campylobacter jejuni pathogenesis involves significant intestinal tissue damage and active secretion.
- Host-derived mediators, rather than bacterial toxins, may drive secretion.
- Bacterial motility is essential for C. jejuni to cause intestinal damage and fluid secretion.