Simple adult rabbit model for Campylobacter jejuni enteritis

Area of Science:

• Veterinary Medicine
• Microbiology
• Infectious Diseases

Background:

• Campylobacter jejuni is a leading cause of bacterial gastroenteritis worldwide.
• Establishing reliable animal models is essential for understanding C. jejuni pathogenesis and developing effective interventions.

Purpose of the Study:

• To evaluate the efficacy of the Removable Intestinal Tie Adult Rabbit Diarrhea (RITARD) model for inducing Campylobacter jejuni infection.
• To characterize the clinical, microbiological, and immunological outcomes of C. jejuni infection in rabbits using the RITARD model.

Main Methods:

• The RITARD procedure involved cecal ligation and ileal knot placement for controlled C. jejuni inoculation in rabbits.
• Daily rectal swabs, blood cultures, and serological assays (ELISA) were performed to monitor infection and immune response.
• Necropsy was conducted to assess pathological changes in the gastrointestinal tract.

Main Results:

• The RITARD model successfully induced C. jejuni infection in 64% of rabbits, characterized by diarrhea, bacteremia, and significant mortality (53%).
• Infected rabbits showed elevated serum immunoglobulin G titers and pathological findings including inflammatory lesions and goblet cell hyperplasia.
• Control animals did not develop diarrhea or mortality, confirming the model's specificity.

Conclusions:

• The RITARD model provides a simple and effective method for establishing C. jejuni infection in adult rabbits.
• This model closely mimics key aspects of human Campylobacteriosis, making it valuable for research.
• The RITARD model facilitates the study of C. jejuni pathogenesis and the evaluation of therapeutic strategies.