1. Leptospirosis/Mycobacteriosis Research Unit, National Animal Disease Center, USDA, Agricultural Research Service, Ames, IA 50010
2. Diagnostic Laboratory, New York State College of Veterinary Medicine, Cornell University, Ithaca, NY 14853
3. Mycobacteria, Brucella Reagents Section, Diagnostic Bacteriology Laboratory, National Veterinary Services Laboratories, USDA, Animal and Plant Health Inspection Services, Ames, IA 50010