1. Centers for Disease Control and Prevention, Division of Vector-Borne Diseases, Bacterial Diseases Branch, Fort Collins, Colorado, USA
2. The Dermatology Clinic, Baton Rouge, Louisiana, USA
3. Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
4. Louisiana Office of Public Health, New Orleans, Louisiana, USA
5. Orange County Public Health Laboratory, Santa Ana, California, USA