1. Rickettsial Zoonoses Branch, National Center for Emerging and Zoonotic Infectious Disease, Centers for Disease Control and Prevention, Atlanta, Georgia.
2. Zoonotic Disease Program, Washington State Department of Health, Olympia, Washington.
3. Division of Microbiology Lab Services, North Dakota Department of Health, Bismarck, North Dakota.
4. Bacterial Diseases Branch, National Center for Emerging and Zoonotic Infectious Disease, Centers for Disease Control and Prevention, Ft. Collins, Colorado.
5. Old Dominion University, Norfolk, Virginia.
6. Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi.
7. Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, Mississippi.
8. Public Health Command-Atlantic, Ft. George G. Meade, Maryland.