Efficacy of Feeding Treatments and Litter Formulations Against Shedding of Salmonella in Broilers
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Research has shown that Salmonella can be prevalent in poultry litter, which can be a source of contamination for newly arrived chicks at the poultry house. Since this organism is a pathogen of concern to the poultry industry, two types of litter amendments and two types of feed additions were created and tested to determine effects of broiler growth, litter moisture and efficacy against Salmonella colonization. Litter amendments consisted of the combination of acidic calcium sulfate (ACS) with either diatomaceous earth (DE) or hydrated sodium calcium aluminiosilicate (HSCAS). Feed additions consisted of differing amounts of sodium bisulfate. For the litter amendment experiments, chicks were placed into pens in isolation rooms. Each litter amendment was applied to 3 pens for replicates of experimental groups. Litter samples were taken weekly from 5 areas in each pen and combined for the determination of Salmonella cfu/g of litter. At 3 and 6 weeks post placement, birds from each pen were euthanized by CO2 asphyxiation. The crop and ceca from these birds were tested for Salmonella cfu/g of crop/ceca or presence/absence of Salmonella. Efficacy of the liter amendments varied in experimental groups on broiler growth characteristics and efficacy against Salmonella. For the determination of sodium bisulfate as a feed addition on Salmonella colonization, birds were placed into 3 experimental groups and placed into respective pens. Two sodium bisulfate experimental groups were used at 0.25% and 0.75%. The other experimental group was the control. Litter samples were taken weekly from 5 areas in each pen and combined for the determination of Salmonella cfu/g of litter, aerobic plate counts, moisture content and pH. Efficacy of the sodium bisulfate as a feed addition varied in the experimental groups on Salmonella colonization, aerobic plate counts, pH and moisture content throughout both trials.
Larrison, Eryn Linnae (2009). Efficacy of Feeding Treatments and Litter Formulations Against Shedding of Salmonella in Broilers. Master's thesis, Texas A&M University. Available electronically from