Campylobacter jejuni diarrhea model in infant chickens

Area of Science:

• Veterinary Medicine
• Microbiology
• Pathogen Research

Background:

• Campylobacter jejuni is a leading cause of bacterial gastroenteritis in humans.
• Understanding its pathogenesis is crucial for controlling infections in both humans and animals.

Purpose of the Study:

• To investigate the pathogenic mechanisms of Campylobacter jejuni infection in a chicken model.
• To determine the correlation between C. jejuni strains and disease presentation in chickens.

Main Methods:

• Oral inoculation of 36- to 72-h-old chickens (Starbro and White Leghorn strains) with varying doses of C. jejuni.
• Monitoring for diarrhea, fluid accumulation, and bacterial multiplication.
• Assessing systemic invasion via organ sampling (spleen, liver, heart blood).
• Histopathological examination of intestinal tissues.

Main Results:

• Most chickens developed watery diarrhea within 2-5 days post-infection, with peak incidence on day 5.
• C. jejuni multiplied significantly in all intestinal segments and frequently invaded systemic organs.
• Histopathology revealed submucosal edema in watery diarrhea cases and epithelial cell invasion in mucoid diarrhea cases.
• No correlation was found between the source of C. jejuni strain and the observed outcome.

Conclusions:

• The chicken model effectively replicates C. jejuni-induced watery diarrhea, bacterial multiplication, and systemic invasion.
• C. jejuni pathogenesis involves gut colonization, fluid accumulation, and potential systemic spread in poultry.
• Further research into host-pathogen interactions and strain variability is warranted.