Government of Saskatchewan
Quick Search:
    Tuesday, September 02, 2014
Saskatchewan! Healthy people. A healthy province.

Regardless of the West Nile virus (WNV) risk level for your health region, remember there is no such thing as "risk-free". If you can be bitten by a mosquito, you can contract West Nile or other mosquito-borne viruses. The main species that carries WNV in Saskatchewan is Culex tarsalis.

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.

See Frequently Asked Questions for information on symptoms of West Nile Virus infection, when to seek medical attention, treatment and personal precautions against mosquitoes.

This Week's West Nile Virus Risk by ecological risk area* - August 28, 2014

Overall Summary

  • Infected Culex tarsalis mosquitoes continue to be detected throughout southern Saskatchewan.
  • The risk of human infections remains at moderate levels throughout most of southern Saskatchewan.
  • We will continue to see positive pools and the potential for human infections going into the Labour Day long weekend as long as the weather stays warm and dry.
  • The forecasted trend to cooler temperatures next week will limit mosquito activity to the warmer afternoon and early evening period.
  • People should get out and enjoy the beautiful weather we have been having, but should be using personal protective measures particularly as dusk approaches and in moderate risk areas.

WNV Risk


The mosquito species that carries WNV has not been detected. This does not mean risk is zero.

(yellow) The mosquito species that carries WNV has been detected in small numbers. There is a low probability of being bitten by an infected mosquito.
(orange) WNV mosquitoes have been detected in numbers where there is a moderate probability of being bitten by an infected mosquito.
(red) High numbers of WNV positive mosquitoes have been identified and are widespread. There is an increasing and high probability of being bitten by an infected mosquito.
West Nile Virus Risk Map 

* Ecological Risk Areas:

Mixed-Grass Prairie
(Sun Country,
Regina Qu'Appelle,
Five Hills, Cypress, Heartland
Health Regions)

Moist Mixed-Grass Prairie 
(Sunrise, Saskatoon,
Prairie North
Health Regions)

Boreal Transition
(Prince Albert
Parkland, Kelsey Trail
Health Regions)

Boreal Forest
(Athabasca, Mamawetan Churchill
River, Keewatin Yatthé
Health Regions) 

For a complete description of the criteria used for determining weekly risk, definitions of accumulated degree days, mosquito pools and other WNV risk indicators, 2014 seasonal surveillance results, and general information on WNV prevention see the links below.

© 2014 Government of Saskatchewan. All rights reserved.