Weekly West Nile Virus Update

July 20, 2018

Manitoba Health, Seniors and Active Living reports favorable weather conditions this season have kept the numbers of nuisance mosquitoes low in many southern Manitoba communities.

However, these warm temperatures and dry conditions have been ideal for Culex tarsalis, a carrier of West Nile virus. Adult mosquito surveillance shows increasing Culex tarsalis numbers and West Nile virus infection rates. The risk for potential human exposure to WNV is moderate at present but likely to increase, particularly as we proceed through the historical high risk period for human exposures in July and August.

At this time, no human cases of West Nile virus have been identified in Manitoba.

While Manitobans are encouraged to enjoy warm weather outdoor activities, it is strongly recommended they reduce their risk of mosquito bites and potential exposure to WNV. Key prevention measures include:

  • reducing the amount of time spent outdoors during peak mosquito hours between dusk and dawn;
  • using an appropriate mosquito repellent;
  • wearing light-colored, loose-fitting clothing with long sleeves and pant legs,
  • maintaining door and window screens, and
  • cleaning and emptying yard items that collect water.

Information on the risk of West Nile virus will continue to be provided to the public throughout the summer. Manitobans can also check the WNV website regularly for up-to-date data and information.

Manitobans can also contact Health Links–Info Santé at 204-788-8200 or at 1-888-315-9257 (toll-free) for more information.


For WNV health concerns, contact your doctor or call:

Health Links - Info Santé
204-788-8200
(Winnipeg) or toll-free 1-888-315-9257