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Research Project:
Prevent Pathogen Contamination in Food Production Animals
Location:
Livestock Issues Research
Project Number: 6208-32000-003-00
Project Type:
Appropriated
Start Date: May 08, 2002
End Date: May 31, 2006
Objective:
Many management practices such as transportation, weaning, handling & the formation of new groups of animals are stressful to cattle & swine. Therefore, this project is focusing on: 1) improve current understanding of the relationship between stress & the pathogen-host interaction; 2) improve current understanding of the relationship between cattle & swine management practices; & 3) compare levels of stress & incidence of epizootic pathogens in new or non-traditional production systems with traditional systems.
Approach:
Objective 1: A model demonstrating a classic behavioral and physiological stress response by injecting a stress hormone (corticotrophin releasing hormone) directly into the brain will be used along with Salmonella challenge to understand the relationship between stress and pathogen shedding. Objective 2: Experiments will be conducted to identify the effect of management practices such as providing shade or water cooling devices to feedlot cattle, providing environmental enrichment devices to cattle, isolating or transporting of calves and early weaned pigs, mixing and handling of cattle and finishing pigs on measures of stress. Along with measures of stress, we will look at levels of E. coli and Salmonella in the animal to identify changes in pathogen shedding. Objective 3: We will compare indoor and outdoor alternative models of sow housing with regard to pathogens in the environment and the animal and behavioral and physiological measures of stress.
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