2017 West Nile Virus Surveillance

West Nile virus activity is determined by the surveillance of:

  1. mosquito larvae
  2. adult mosquito pools
  3. human cases

Protect yourself. Wear long-sleeved shirts, long pants, socks and shoes when outdoors in the evening or early morning. Use an insect repellent approved by the Pest Management Regulatory Agency (PMRA).

Remove standing water. Remove or change all standing water around your home to reduce potential mosquito breeding areas.

West Nile virus Surveillance Halton Region 2017

Week of August 13 - 19, 2017

Halton Total Burlington  Oakville Halton Hills Milton
Mosquito Pools Positive for WNV Reported 9 2 3 1 3
#  Probable Human Cases Reported 0
0 0 0 0
#  Confirmed Human Cases Reported 0 0 0 0 0
#  Larvicide Applications to Standing Water 50 13 24 7 6

Year to Date 2017

Halton Total Burlington  Oakville Halton Hills Milton
Mosquito Pools Positive for WNV Reported 24 6 12 1 5
# Probable Human Cases Reported 0
0 0 0 0
# Confirmed Human Cases Reported 0 0 0 0 0
# Larvicide Applications to Standing Water 480 87 237 73 83

Prevention and Control Measures

50 standing water sites were larvicided during the week of August 13-19, 2017.

  • 24 in Oakville
  • 7 in Halton Hills
  • 13 in Burlington
  • 6 in Milton

The fourth round of catch basin larviciding has begun and the indicator colour is green.

For more information about West Nile virus, please call the Halton Region Health Department.