Institution: | Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164-7060, USA (MD Tucker, Sellon, RL Tucker); IDEXX Reference Laboratories Inc., Pullman, Washington, USA (Wills); Dillon Small Animal Hospital, Dillon, Montana, USA (Simonsen); Intracellular Pathogens Research Laboratory, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA (Maggi, Breitschwerdt) |