Campylobacter jejuni colitis in gnotobiotic dogs

Area of Science:

• Veterinary Medicine
• Microbiology
• Gastroenterology

Background:

• Campylobacter jejuni is a leading cause of bacterial gastroenteritis worldwide.
• Understanding its pathogenesis is crucial for developing effective treatments.

Purpose of the Study:

• To evaluate the gnotobiotic dog as a model for Campylobacter jejuni-induced colitis.
• To characterize the clinical and pathological responses to oral Campylobacter jejuni inoculation.

Main Methods:

• Six gnotobiotically reared Beagle puppies were orally inoculated with Campylobacter jejuni.
• Control dogs were maintained without inoculation.
• Clinical signs and colonic lesions were assessed at various time points post-inoculation.

Main Results:

• Inoculated dogs exhibited transient lassitude, inappetence, mild diarrhea, and tenesmus.
• Histopathological examination revealed typhlitis and colitis, characterized by mucosal congestion, goblet cell loss, epithelial changes, and inflammatory cell infiltration.
• Campylobacter jejuni colonized the colon but did not invade the mucosa.

Conclusions:

• The gnotobiotic dog model demonstrated susceptibility to Campylobacter jejuni infection, developing characteristic lesions of colitis.
• This model is suitable for further research into the pathogenesis of Campylobacter colitis.