Within-flock variations of Campylobacter loads in caeca and on carcasses from broilers

Area of Science:

• Food Safety
• Microbiology
• Poultry Science

Background:

• Campylobacter spp. are a major cause of foodborne illness globally.
• Broiler chickens are a primary reservoir for Campylobacter.
• Understanding bacterial load variation is crucial for effective control strategies.

Purpose of the Study:

• To determine the prevalence and load of Campylobacter spp. in broiler caeca and on carcass rinse samples.
• To assess the within-flock variation of Campylobacter spp. in individual birds.
• To inform risk assessment protocols based on sampling strategies.

Main Methods:

• Analysis of 540 individual broiler caecum samples from 27 flocks.
• Analysis of 445 carcass rinse samples from 27 flocks.
• Quantification of Campylobacter spp. using log cfu/g (caeca) and log cfu/ml (carcass rinse).

Main Results:

• Campylobacter spp. were detected in 10-100% of caeca and 85-100% of carcass rinse samples per flock.
• Caecal Campylobacter loads varied up to 6.3 log cfu/g within a flock.
• Carcass rinse Campylobacter loads varied up to 3.2 log cfu/ml within a flock.

Conclusions:

• Broiler flocks exhibit high Campylobacter spp. prevalence.
• Significant variation in Campylobacter spp. load exists among individual birds within a flock.
• Sampling strategies must account for this high variability to ensure reliable risk assessments.