1. Department of Agricultural and Biosystems Engineering, Iowa State University, 1201 Sukup Hall, Ames, IA 50011, USA
2. National Laboratory for Agriculture and the Environment, USDA-ARS, 2110 University Blvd, Ames, IA 50011, USA
3. Food Safety and Enteric Pathogens Research Unit, National Animal Disease Center, USDA-ARS, 1920 Dayton Ave, Ames, IA, 50010, USA
4. Department of Bioinformatics and Computational Biology, Iowa State University, 2014 Molecular Biology Building, Ames, IA 50011, USA