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Articles by P.T. Price
Total Records ( 2 ) for P.T. Price
  P.T. Price , T. Gaydos , R. Berghaus and C. Hofacre
  Background and Objective: To combat the persistence of Salmonella in poultry products, intervention strategies that have efficacy in the digestive tract of birds are needed as part of a comprehensive food safety plan. A study was commissioned to evaluate the ability of a high mannan and β-glucan yeast fraction to prevent Salmonella Enteritidis colonization in laying hens. Material and Methods: Twenty-four Hy-Line pullets were placed in individual cages and at 17 weeks of age all 24 pullets were challenged orally with 7×107 CFU/bird of Salmonella Enteritidis. At 18 weeks of age, all ceca and ovaries were aseptically removed and cultured for Salmonella Enteritidis prevalence and number by the most probable number (MPN) method. Results: There was a numerical reduction of cecal Salmonella Enteritidis prevalence that was significant at p = 0.089 (16.7% positive) in the yeast fraction group versus the untreated control (58.3%). Conclusions: Reduction in the ceca of hens is an important result indicating this yeast cell wall can impact levels of Salmonella Enteritidis shed to the environment and thus reduce the potential of Salmonella Enteritidis contamination of the eggshell.
  P.T. Price , T. Gaydos , J.C. Padgett , K. Gardner and C. Bailey
  Background and Objective: Salmonella is a gram-negative rod-shaped pathogen responsible for approximately 1 million foodborne illnesses per year in the U.S. Previous studies with highly concentrated levels of mannans (>20%) in yeast cell wall have shown to reduce Salmonella counts in broiler ceca when added to feed. This study was conducted to understand the effects of concentrated mannans on Salmonella in egg producing hens. Materials and Methods: A total of 24 Hy-Line W36 layers were challenged with Salmonella Typhimurium, 12 birds fed basal diet only (Control) and 12 birds fed the basal diet plus treatment of 500 ppm cell wall. At one-week post challenge, all birds were humanely euthanized and cecal prevalence and enumeration were recorded. Results: Cecal counts on birds challenged with S. Typhimurium showed a final count of 4.71 log10 CFU mL–1, while yeast cell wall sample counts were 3.71 log10 CFU mL–1 (p = 0.015). Conclusion: A 1 log reduction of cecal Salmonella is a biologically important result indicating there may be some potential for this yeast cell wall to impact levels of Salmonella Typhimurium in the ceca.
 
 
 
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