He estimated that 20 percent of the food produced in the United States becomes a waste product. Feed is the major cost of animal production. Non-traditional feeds may be able to reduce feed costs. But many challenges abound, such as the possible transfer of residues or pathogens, consistency of nutrient content, and separation of materials such as plastics. Dr. Dale Boyle, Executiv Director of the National Association of Federal Veterinarians, addressed the variable definitions of epidemiology and use of epidemiologists in the federal government.
Epidemiology is still in an embryonic stage.
The frequent inability of epidemiologists to clearly explain the meaning of data manipulations has frustrated their acceptance by the public and by policy makers. The scientific and personal credibility of epidemiologists is essential to be able to survive challenge from detractors. The USDA-FSIS has hired epidemiologists in the districts but has not yet defined their duties. They will or could be involved with residues, zoonosis, and animal and human health issues. This could include a vision of the role of epidemiologists.