Arbovirus activity in Canada

  • H. Artsob
Part of the Archives of Virology Supplementum book series (ARCHIVES SUPPL, volume 1)


Nineteen arboviruses have been isolated in Canada, including 11 mosquito-transmitted, 6 tick-transmitted and 2 culicoides-transmitted viruses. Only 6 of these viruses have been documented to have caused symptomatic infections in humans in Canada—western equine encephalitis, St. Louis encephalitis (SLE), snowshoe hare (SSH), Jamestown Canyon (JC), Powassan, and Colorado tick fever viruses. Western equine encephalitis has been the most important arbovirus in Canada, where clinical disease has been recognized, primarily in the prairie provinces, since the 1930’s. SLE virus was first isolated in Saskatchewan in 1971 but disease in Canada due to SLE was not documented until 1975 when an outbreak of 66 cases occurred in Ontario and one case each occurred in Manitoba and Quebec. California serogroup viruses have been found throughout Canada; SSH is the most widespread serotype but the JC serotype is also prevalent. Clinical California serogroup virus infections have been recognized in Canada, due primarily to the SSH serotype; JC encephalitis has also been documented. Twelve tick-transmitted symptomatic infections have been diagnosed from 1958–1988. These include 11 Powassan virus infections from Ontario, Quebec, and New Brunswick and a case of Colorado tick fever from Alberta.


Garter Snake Snowshoe Hare Eastern Equine Encephalitis Western Equine Encephalitis Virus Western Equine Encephalitis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • H. Artsob
    • 1
  1. 1.Zoonotic Diseases, Bureau of MicrobiologyLaboratory Center for Disease ControlOttawaCanada

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