Weekly West Nile Virus Update

September 14, 2018

Adult mosquito surveillance conducted during the week of September 2, 2018 detected low levels of Culex tarsalis activity in the twenty-four communities with traps running. One (1) additional West Nile Virus (WNV) positive mosquito pool was detected, bringing the season total to one-hundred and sixty-eight (168). Further, five additional human cases were reported, bringing the season total to twenty-eight (28). Surveillance has also detected seven (7) WNV positive horses and fourteen (14) WNV positive birds. There are currently no orders for adult mosquito control in the province.

Preliminary trapping data for the week of September 9, 2018 shows a continued decrease in Culex tarsalis numbers across southern Manitoba. Culex tarsalis were only detected in 7 of the 13 trapping communities with traps running.

With the cooler temperatures and shortening day length the risk of exposure to WNV at this time is minimal.

This update will mark the last for the 2018 season.

For more information about WNV, contact Health Links–Info Santé at 204-788-8200 or 1-888-315-9257 (toll-free) or visit www.gov.mb.ca/health/wnv.

For WNV health concerns, contact your doctor or call:

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