Abstract
This study was conducted to determine the influence of feed and water withdrawal at different times on the detection of Campylobacter jejuni in the cloaca and ceca of broilers. Also studied was the influence of withdrawal on the carcass yield and liver weights of 49-day-old Avian x Avian male broiler chickens. Feed was withdrawn from broilers at 0, 6, 12, 18, and 24 hr before broiler processing, and water was withheld from a select sampling. C. jejuni detection at various sampling sited did not differ between broilers given water and those without, but differed significantly (P < .05) at varied feed withdrawal times. Broilers not given water had overall C. jejuni detection rates 17% higher for cloaca samples (70% vs. 53%) and 5% lower cecal detection rates than broilers given water.Carcass yield percentages were significantly (P≤.05) higher for extended feed withdrawal periods (12-24 hr) due to longer periods of gut content clearance. Liver weights (g) were reduced significantly (P≤.05) with the extended feed withdrawal periods. Carcass yield increased, while liver yield significantly decreased (P≤.05), as a result of feed and water withdrawal before processing. These data indicate that carcass contamination can occur from the presence of C. jejuni in the gastrointestinal tract regardless of water presence during the feed withdrawal period.
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