1. Office of Research, Center for Veterinary Medicine, US Food and Drug Administration, Laurel, MD 20708.
2. Danish Veterinary Institute, (V)DK-1790 Copenhagen, Denmark.
3. Clinical Microbiology Institute (CMI), Wilsonville, OR 97070.
4. USDA Agricultural Research Services, Russell Research Center, Athens, GA 30604.
5. Focus Technologies, Herndon, VA 20171.
6. Abbott Laboratories, Abbott Park, IL 60064. Present address: Focus Technologies, Herndon, VA 20171.
7. Abbott Laboratories, Abbott Park, IL 60064.
8. Division of Immunity and Infection, The Medical School, University of Birmingham, Birmingham, B15 2TT UK.
9. The Jones Group/JMI Laboratories, North Liberty, IA 52317.
10. Clinical Microbiology Laboratory, Duke University Medical Center, Durham, NC 27710.
11. Medical Microbiology Laboratory, University of Alberta Hospital, Edmonton, Alberta TGG2J2, Canada.
12. Michigan State University, College of Human Medicine, East Lansing, MI 48824.
13. Michigan State University, College of Veterinary Medicine, East Lansing, MI 48824.