1. Department of Biological Sciences, University of Tulsa, Tulsa, OK 74104, USA
2. Division of Vector–borne Infectious Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, PO Box 2087, Fort Collins, CO 80522, USA
3. Department of Ecology and Evolutionary Biology, rale University, New Haven, CT 06520, USA
4. Institute for Medical Microbiology, Infectious and Epidemic Diseases, Ludwig-Maximilians University, D-80539 Munich, Germany