*Applications will be reviewed on a rolling-basis and this posting will remain open until filled.  ARS Office/Lab and Location: A postdoctoral research opportunity is available with the U.S. Department of Agriculture (USDA), Agricultural Research Service (ARS), National Animal Disease Center (NADC), in Ames, IA for a motivated and independent scientist to study the mechanisms of the interaction of bacterial pathogens with the ruminant hosts and to develop methodologies to mitigate disease losses in the livestock industry. Research Project: The Ruminant Diseases and Immunology Research Unit (RDIRU) works on important respiratory diseases in bison and cattle. The selected applicant will contrib