1. 1Center for Microbial Genetics and Genomics, Northern Arizona University, PO Box 4073, Flagstaff, AZ 86011, USA
2. 2Rickettsial Zoonoses Branch, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, USA
3. 3Informatics and Computing Program, Northern Arizona University, PO Box 5717, Flagstaff, AZ 86011, USA
4. 4Department of Mathematics and Statistics, Northern Arizona University, PO Box 5717, Flagstaff, AZ 86011, USA
5. 5Pathogen Genomics Division, Translational Genomics Research Institute, Phoenix, Arizona, USA