1. Intracellular Pathogens Research Laboratory, Comparative Medicine Institute, College of Veterinary Medicine, 1060 William Moore Drive, North Carolina State University, Raleigh, NC 27607.
2. Public Health Activity-Rheinland Pfalz, Dog Center Europe, CMR 422, DCE APO, AE 09067.
3. U.S. Army Medical Department Center and School, Joint Base San Antonio-Fort Sam Houston, 2899, Schofield Toad, Suite 2630, Houston, TX 78234-7583.