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

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

4. WNV Surveillance Method v.s. Virus Amplification in Nature

5. Objective of Wild Bird Surveillance

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

13. WNV Dissemination by Migratory Birds 2000 - 2001? To Central and South America

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

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