Submitted to: Poultry Science
Publication Type: Abstract Only
Publication Acceptance Date: 3/1/2004
Publication Date: 7/25/2004
Citation: Kubena, L.F., McReynolds, J.L., Byrd II, J.A., Anderson, R.C., Ricke, S.C., Nisbet, D.J. 2004. Effects of experimental chlorate product (ECP) in drinking water on Salmonella enteritidis (SE) in laying hens during an induced molt [abstract]. Poultry Science. 83(Suppl. 1):69. Interpretive Summary:
Technical Abstract: The method most commonly used to induce molting and stimulate multiple egg-laying cycles in laying hens for commercial egg production is feed deprivation. Unfortunately, an increased risk of Salmonella enteritidis (SE) may result from the use of this method. Methods to stimulate multiple egg-laying cycles without increasing the risk of SE are needed. Hens over 50 wk of age were divided into 12 groups of 11 hens each and placed in individual laying cages. Two wk prior to dietary changes, hens were placed on an 8-h light and 16 h-dark photoperiod that continued for the 9-day experiment. All hens were challenged orally with 10**6 cfu of SE on the fourth day. Treatments were non-fed hens with distilled water (NFD), non-fed hens with the experimental chlorate product (ECP which provided 15mM chlorate ion concentration) water (NFECP), alfalfa diets with distilled water (ALD), and alfalfa diets with ECP water (ALECP). In the NFD hens, 67% (Log10 2.74) of the crops and 94% (Log10 5.62) of the ceca were colonized; whereas, for the NFECP hens a significant reduction to 22% (Log10 1.05) of the crops and 61% (Log10 2.44) of the ceca was observed. In the ALD hens, 61% (Log10 2.52) of the crops and 94% (Log10 4.06) of the ceca were colonized. In the ALECP hens, a highly significant reduction to 11% (Log10 1.26) of the crops and 39% (Log10 1.12) of the ceca was observed. When compared with the NFD hens, a significant reduction in SE invasion of the ovary, liver, and spleen occurred in all other treatments, except the ovary in the ALD hens. The low alfalfa intake is probably a factor in our lowered protection against SE, when compared with previous results. These results suggest that ECP added to the drinking water may be a useful tool to reduce the risk of SE during an induced molt by feed deprivation or the use of alfalfa molting diets. For several parameters, ECP combined with the alfalfa diet was most efficacious.