Since 2015, West Nile Virus (WNV) surveillance in BC has been conducted through testing horses and birds that are sick or dead, and humans who have symptoms compatible with WNV. Blood and organ donations are also screened for WNV. Between 2004 and 2014, surveillance also included trapping and testing mosquitoes for WNV. 

As positives occur they will be posted here.

West Nile Virus in British Columbia (2009-2024)

*Map includes confirmed, locally acquired cases only, excludes travel-related cases.
**Horses (locally acquired), birds, or mosquitoes
updated: September 16, 2024
† Data from 2009 to 2024: sources: http://doh.wa.gov, https://healthandwelfare.idaho.gov, https://dphhs.mt.gov, https://www.alberta.ca/health

• 2024: two travel-related human cases were reported (travel-related cases not mapped), no animals tested positive for WNV in BC.
  
• 2023: one travel-related human case was reported (travel-related cases not mapped), no animals tested positive for WNV in BC.
  
• 2022: no humans or animals tested positive for WNV in BC.
  
• 2021: two travel-related human cases were reported (travel-related cases not mapped), no animals tested positive for WNV in BC.
  
• 2020: no humans or animals tested positive for WNV in BC.
  
• 2019: one travel-related human case and one travel-related horse case were reported (travel-related cases not mapped)
  
• 2018: two ravens, one blue jay and one horse were reported.
  
• 2017: two human cases (one travel-related), and four horse cases were reported.
  
• 2016: one travel-related human case was reported. 10 horses (2 travel-related) and 2 crows tested positive. These animals were the first indication of WNV presence in the Central and East Kootenay areas of BC.
• 2015: no humans or animals tested positive for WNV in BC.
• 2014 West Nile Virus Surveillance Report
• 2013 West Nile Virus Surveillance Report
• 2012 West Nile Virus Surveillance Report
  
• 2011 West Nile Virus Surveillance Report
  
• 2010 West Nile Virus Surveillance Report
• 2009 West Nile Virus Surveillance Report
• 2008 West Nile Virus Surveillance Report
• 2007 West Nile Virus Surveillance Report
• 2006 West Nile Virus Surveillance Report
• 2005 West Nile Virus Surveillance Report
• 2004 West Nile Virus Surveillance Report