Hamilton, Halton confirm first human cases of West Nile virus this year

The first human cases of West Nile virus have been reported in Hamilton as well as the Halton Region this season.

The detection of the virus in humans has prompted the Medical Officer of Health in Hamilton to move the risk of West Nile virus in the city from moderate to high.

West Nile virus is contracted through mosquito bites and has the potential to cause West Nile fever.

Although most cases do not cause visible symptoms, about 20 per cent of those infected may develop more severe illness including inflammation of the brain or the lining of the brain.

If symptoms do occur, they appear two to 14 days after being bitten by an infected mosquito.

READ MORE: City of Hamilton reports West Nile positive mosquitoes

The first human case of West Nile virus this season was also confirmed in the Halton Region today.

The Associate Medical Officer of Health for Hamilton, Dr. Bart Harvey said it’s important to take precautions to avoid illnesses spread by insects.

“Employing simple preventive measures such as using insect repellent containing DEET or Icaridin, covering up, and removing standing water on your property to prevent mosquito breeding will reduce your risk while you enjoy the outdoors,” Dr. Harvey said.

READ MORE: Niagara Region confirms 1st human case of West Nile virus this year

Hamilton Public Health continues to carry out a comprehensive West Nile Virus surveillance and prevention program to assess the risk for human illness.

Three rounds of larviciding treatments have been completed on city street catch basins, in addition to treatment of surface waters on public land.

Dr. Harvey said the risk of West Nile virus will drop once there is a heavy frost that reduces the number of mosquitoes.