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Emergence of Sylvatic Echinococcus granulosus as a Parasitic Zoonosis of Public Health Concern in an Indigenous Community in Canada
Within a remote Canadian Indigenous community, at least 11* of people had antibodies against Echinococcus granulosus and E. granulosus eggs were detected in 6* of environmentally collected canine fecal samples. Dog ownership, hunting, and trapping were not risk factors for seropositivity, suggesting that people are most likely exposed to E. granulosus through indirect contact with dog feces in the environment. In this situation, human exposure could be most effectively curtailed by preventing consumption of cervid viscera by free-roaming dogs.
Author Notes
Financial support: This study was supported by the Division of Infectious Diseases, Royal University Hospital and the Western College of Veterinary Medicine Interprovincial Graduate Fellowship for Veterinarians.
Authors' addresses: Chelsea G. Himsworth and Frederick A. Leighton, Department of Veterinary Pathology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada, E-mails: chelsea.himsworth@usask.ca and ted.leighton@usask.ca. Emily Jenkins, Janet E. Hill, and Brent A. Wagner, Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada, E-mails: emily.jenkins@usask.ca, janet.hill@usask.ca, and brent.wagner@usask.ca. Mandiangu Nsungu, Northern Inter-Tribal Health Authority, Prince Albert, Saskatchewan, Canada, E-mail: mnsungu@nitha.com. Momar Ndao, National Reference Centre for Parasitology, Montreal General Hospital, Montreal, Quebec, Canada, E-mail: momar.ndao@mcgill.ca. R. C. Andrew Thompson, Catherine Covacin, and Amanda Ash, World Health Organization Collaborating Centre for the Molecular Epidemiology of Parasitic Infections, School of Veterinary and Biomedical Sciences, Murdoch University, Western Australia, Australia, E-mails: a.thompson@murdoch.edu.au, c.covacin@murdoch.edu.au, and A.Ash@murdoch.edu.au. Athena McConnell and Stuart Skinner, Division of Infectious Diseases, Royal University Hospital, Saskatoon, Saskatchewan, Canada, E-mails: Athena.McConnell@saskatoonhealthregion.ca and Stuart.Skinner@saskatoonhealthregion.ca.