West Nile Virus – Ontario 2002 Ian K. Barker Canadian Cooperative Wildlife Health Centre Ontario Veterinary College University of Guelph.

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Presentation transcript:

West Nile Virus – Ontario 2002 Ian K. Barker Canadian Cooperative Wildlife Health Centre Ontario Veterinary College University of Guelph

West Nile Virus Transmission Cycle Avian reservoirs VIRUS - Dead - end hosts Mosquito vectors Culex species mainly Spill-over via bridging vectors VIRUS Amplification

WNV Surveillance Method v.s. Virus Amplification in Nature

Objective of Wild Bird Surveillance

CCWHC Dead Bird Processing carcasses, sightings accession, dissection, specimen collection & shipment database: tracking, reporting, mapping, accounting

WNV Dissemination by Migratory Birds ? To Central and South America

Aug 1, 2002 Aug 23, 2002 Sept. 7, 2002 WNV Explosion Nov 1, 2002

Index case – WNV in a dead crow – May 19, 2002