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Abstract
1. Newly-hatched broiler chicks were treated orally with a commercial competitive exclusion product (Broilact®) in 3 replicate trials 2. After 24 h the treated chicks and untreated control chicks were challenged orally with approximately 104 cfu of Campylobacter jejuni. 3. The caeca of the birds were examined quantitatively for campylobacter 12 d after the challenge. 4. In 3 separate trials, the treatment prevented or reduced colonisation of the challenge organisms in the caeca. The percentage of colonised birds varied from 0% to 62% in the treated groups and was 100% in the control groups. The average number of campylobacter was considerably lower in the treated groups than in the control groups.
