Laura J. BaselerAnimal Disease Diagnostic Laboratory and Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47907.
Govinda S. VisvesvaraDivision of Foodborne, Waterborne and Environmental Diseases, National Center for Emerging and Zoonotic Infectious Diseases, CDC, 1600 Clifton Rd, Atlanta, GA 30333.