D Martin1, P McNicol, R Marchand, P Lebel, M S Peppler, B R Brodeur. 1. National Laboratory for Immunology, Laboratory Centre for Disease Control, Ottawa, Ontario; Cadham Provincial Laboratory, Winnipeg, Manitoba; Département de Microbiologie et Immunologie, Hôpital Ste-Justine, Montréal, Québec; and Department of Medical Microbiology and Infectious Diseases, University of Alberta, Edmonton, Alberta.