Campylobacter jejuni infection in broiler chickens

Area of Science:

• Veterinary Science
• Microbiology
• Food Safety

Background:

• Campylobacter jejuni is a significant foodborne pathogen.
• Poultry are a primary reservoir for C. jejuni.
• Understanding C. jejuni dynamics in broiler chickens is crucial for food safety.

Purpose of the Study:

• To evaluate the colonization and shedding of C. jejuni in broiler chickens following experimental inoculation.
• To assess the impact of C. jejuni infection on broiler chicken growth and health.

Main Methods:

• Day-old broiler chickens were inoculated with varying doses of C. jejuni isolates via crop gavage.
• Chickens were housed in isolation, and C. jejuni levels were enumerated from intestinal and cecal samples at 5, 12, and 19 days post-inoculation.
• Body weights were measured, and clinical signs and gross pathology were assessed.

Main Results:

• C. jejuni successfully colonized the intestines and ceca of inoculated chickens, with levels increasing over time.
• No significant differences in mean body weights were observed at 5 and 12 days post-inoculation, though some differences were noted at 19 days.
• No clinical signs of illness or gross/histopathological lesions were observed in any chickens.

Conclusions:

• Broiler chickens can be successfully infected with C. jejuni without apparent adverse effects on growth or health.
• Intestinal and cecal colonization by C. jejuni increases post-inoculation, highlighting the potential for shedding.
• Further research is needed to understand the long-term implications and transmission dynamics.