1. Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University , Ames, Iowa, USA
2. National Institute of Antimicrobial Resistance Research and Education (NIAMRRE), Iowa State University Research Park , Ames, Iowa, USA
3. Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University , Ames, Iowa, USA
4. The Roy J. Carver Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University , Ames, Iowa, USA