CMAJ • August 4, 2009; 181 (3-4). First published July 20, 2009; doi:10.1503/cmaj.090859
© 2009 Canadian Medical Association or its licensors
All editorial matter in CMAJ represents the opinions of the authors and not necessarily those of the Canadian Medical Association.
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Research

Investigation of the first cases of human-to-human infection with the new swine-origin influenza A (H1N1) virus in Canada

Jennifer Cutler, MHSc, Emily Schleihauf, MAE, Todd F. Hatchette, MD, Bev Billard, BBA, Gaynor Watson-Creed, MD, Ross Davidson, PhD, Yan Li, PhD, Nathalie Bastien, PhD, Shelly Sarwal, MD the Nova Scotia Human Swine Influenza Investigation Team

From the Canadian Field Epidemiology Program (Cutler), the Canadian Public Health Service (Schleihauf) and the National Microbiology Laboratory (Li, Bastien), Public Health Agency of Canada, Ottawa, Ont.; the Nova Scotia Department of Health Promotion and Protection (Cutler, Schleihauf, Billard, Watson-Creed, Sarwal), Halifax, NS; the Division of Microbiology (Hatchette, Davidson), Department of Pathology and Laboratory Medicine, Capital District Health Authority, Halifax, NS; and the Departments of Pathology (Hatchette, Davidson), Community Health and Epidemiology (Watson-Creed, Sarwal), and Microbiology and Immunology (Davidson), Dalhousie University, Halifax, NS

Correspondence to: Dr. Shelly Sarwal, 1601 Lower Water St., P.O. Box 487, Halifax NS B3J 2R7; fax 902 428-3313; shelly.sarwal{at}gov.ns.ca

The outbreak of human infection due to the novel swine-origin influenza A (H1N1) virus began in Mexico in March 2009. As of July 6, 2009, more than 94 000 laboratory-confirmed cases were reported in over 100 countries, including 7983 cases in Canada. In this report, we describe the epidemiologic and clinical characteristics of the first cluster of reported cases of human-to-human transmission of the new influenza virus in Canada.


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