1 Department of Microbiology, Oregon State University, Corvallis, OR, 97331, USA; Department of Statistics, Oregon State University, Corvallis, OR, 97331, USA. Electronic address: thomas.sharpton@oregonstate.edu.
2 Department of Microbiology, Oregon State University, Corvallis, OR, 97331, USA; Department of Biomedical Sciences, Oregon State University, Corvallis, OR, 97331, USA.
3 Department of Microbiology, Oregon State University, Corvallis, OR, 97331, USA; Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR, 97331, USA.
4 Department of Microbiology, Oregon State University, Corvallis, OR, 97331, USA.