1. Centers for Disease Control and Prevention, Division of Vector Borne Infectious Diseases, Fort Collins, Colorado 80521
2. Centers for Disease Control and Prevention, Office of Global Health, Atlanta, Georgia 30333
3. International Emerging Infections Program, Nonthaburi, Thailand 11000
4. Ministry of Public Health, Nonthaburi, Thailand 11000
5. Department of Veterinary Medicine, Nihon University, Fujisawa, Japan 2528510
6. School of Veterinary Medicine, University of California, Davis, California 95616
7. University of Texas Medical Branch, Galveston, Texas 77555
8. Sechenov's Moscow Medical Academy, Moscow, Russia 11988