Influence of Feeding and Fasting Broilers Prior to Marketing on Cecal Access of Orally Administered Salmonella

Authors:
  • EME.T. Moran
    E.T. Moran
  • E3E. T. MORAN*, JR., and S. F. BILGILIPoultry Science Department and Alabama Agricultural Experiment Station, Auburn University, AL 36849-5416
    E. T. MORAN*, JR., and S. F. BILGILIPoultry Science Department and Alabama Agricultural Experiment Station, Auburn University, AL 36849-5416
  • JMJr. E. T. Moran
    Jr. E. T. Moran
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Abstract
Male birds (7 weeks of age) were subjected to four feeding and fasting (crate confinement) treatments (Trt): ad libitum access to feed and water in pens 10 h pre- and post-intubation, (Trt 1); ad libitum access to feed and water in pens 10 h pre- and post-intubation, (Trt 1); ad libitum access to feed and water in pens 10 h pre-intubation followed by 10 h crating in coops without feed and water (Trt 2); crating in coops without feed and water 10 h pre- and post-intubation (Trt 3); and crating in coops without feed and water for 10 h followed by ad libitum access to feed and water for 10 h in pens (Trt 4). All birds (16/pen; 2 pens/Trt) were crop intubated with 5 × 107 colony forming units (CFU) of a nalidixic acid resistant (Nal+) strain of S. typhimurium. Treatments 2 and 3 led to more S. typhimurium-Nal+ associated with the ceca than when the feed and water were continuously available (Trt 1) or removed (Trt 4). In a separate study, females were caged individually without feed but water was provided for 12 h, then 9.75 × 107 CFU of S. typhimurium-Nal+/bird were crop intubated. Feed was resumed 2 h later. Cloacal swabs taken 24, 48, and 72 h after intubation proved to be 12, 15, and 16/18 positive for S. typhimurium-Nal+, respectively. The ceca at 72 h were 15/18 positive. Salmonellae that are orally consumed prior to and during crating and transportation have access to the ceca where they may be retained throughout processing of the carcass.

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