2007 Annual Report 1a.Objectives (from AD-416) To evaluate the relative impact of lighting programs during growout on broiler performance, stress level, behavior, welfare, and colonization by Salmonella and Campylobacter. 1b.Approach (from AD-416) ARS will be provided access to broiler flocks managed under different protocols at UGA facilities and challenge & necropsy broilers throughout project. ARS will then provide results from challenge and provide input into experimental design parameters and data collection. 3.Progress Report This report serves to document research conducted under a Nonfunded Cooperative Agreement between ARS and UGA-Fairchild. Additional details of research can be found in the report for the parent project 6612-32000-055-02-00D. Five 6-week growout broiler trails have been performed at UGA evaluating photoperiod duration and light intensity. We have developed a broiler challenge and litter sampling protocol for Salmonella. We have demonstrated that by stepping on drag swabs during litter sampling improves the incidence of Salmonella detection by 20% without an increase in cost or sample time, since shoes are typically covered with disposal booties upon entering each house. Stepping on drag swabs for the detection of Salmonella is presently being evaluated in commercial poultry growout and breeder houses. 6.Technology Transfer Number of non-peer reviewed presentations and proceedings 3