West Nile virus (WNV) is a mosquito-borne virus that can be transmitted to humans through the bite of an infected mosquito. The main species that carries WNV in Saskatchewan is Culex tarsalis.
Regardless of the West Nile virus risk level in Saskatchewan, remember there is always some risk of WNV transmission except after a wide-spread hard frost and throughout winter. If you get bitten by an infected mosquito, you can contract West Nile or other mosquito-borne viruses.
Take precautions when you are out in areas where mosquitoes are present. Protect yourself by covering up and wearing repellents or reducing the amount of time spent outdoors. Mosquitoes can be active at any time but are most active in the evening and throughout the night.

Weekly WNV Surveillance Infographics for 2023
- WNV Surveillance Infographic - week ending September 23
- WNV Surveillance Infographic - week ending September 9
- WNV Surveillance Infographic - week ending September 2
- WNV Surveillance Infographic - week ending August 26
- WNV Surveillance Infographic - week ending August 19
- WNV Surveillance Infographic - week ending August 12
- WNV Surveillance Infographic - week ending August 5
- WNV Surveillance Infographic - week ending July 29
- WNV Surveillance Infographic - week ending July 22
- WNV Surveillance Infographic - week ending July 15
- WNV Surveillance Infographic - week ending July 8
- WNV Surveillance Infographic - week ending July 1
- WNV Surveillance Infographic - week ending June 24
- WNV Surveillance Infographic - week ending June 17
Weekly WNV Detailed Surveillance Reports for 2023 (printable PDFs)
- WNV Surveillance Report - week ending September 23
- WNV Surveillance Report - week ending September 9
- WNV Surveillance Report - week ending September 2
- WNV Surveillance Report - week ending August 26
- WNV Surveillance Report - week ending August 19
- WNV Surveillance Report - week ending August 12
- WNV Surveillance Report - week ending August 5
- WNV Surveillance Report - week ending July 29
- WNV Surveillance Report - week ending July 22
- WNV Surveillance Report - week ending July 15
- WNV Surveillance Report - week ending July 8
- WNV Surveillance Report - week ending July 1
- WNV Surveillance Report - week ending June 24
- WNV Surveillance Report - week ending June 17