1. Department of Pathobiology, University of Washington, Seattle, Washington 981951;
2. Department of Infectious Diseases, Pfizer Central Research, Groton, Connecticut 06340-15962;
3. Unite des Agents Antibacterienes, Institute Pasteur, Paris Cedex 15, France3;
4. Danish Veterinary Laboratory, DK-1790 Copenhagen, Denmark4;
5. Department of Microbiology, Monash University, Clayton, Victoria 3168, Australia5; and
6. Antimicrobial Research Laboratory, National Public Health Institute, FIN-20520 Turku, Finland6