Protect yourself from West Nile virus

As the summer winds up, it’s easy to start thinking about back-to-school and the autumn season, but did you know that late summer and early autumn are also the times when West Nile virus (WNV) is often spread and when the symptoms of mosquito-borne diseases often start to appear? Working together, we can work to reduce WNV in our communities while making smart, healthy choices.

Since the virus is spread by mosquitoes, until the first hard frost in the fall, the most important step to preventing WNV is to prevent mosquito bites. Taking a few simple actions can make all the difference in protecting your family’s health:

  1. Wear insect repellent with DEET or Icaridin;
  2. Avoid being outdoors at dusk and dawn;
  3. Cover up – wear light coloured clothing that covers your arms and legs; and
  4. Remove areas of standing water from your home since mosquitoes lay their eggs in water that doesn’t flow.

To help control the mosquito population and reduce the risk of WNV, the Halton Region Health Department treats areas of standing water, such as catch basins, with a larvicide. This larvicide prevents the mosquito larvae from maturing into adult mosquitoes. When walking around your neighbourhood, you may have noticed some dots of spray paint on catch basins – these indicate how many rounds of larvicide have been applied to each catch basin.

Health Department staff also set mosquito monitoring traps throughout the region to determine the level of WNV risk. The number and types of mosquitoes trapped are examined and sent for WNV testing. If the Health Department finds West Nile virus positive mosquitoes in the region, we inform the community to remind you how to help prevent the spread of the virus across Halton.

To learn more about how to protect yourself against WNV, visit Working together to prevent WNV, we can make safe and healthy choice and keep Halton a great place to live, work, raise a family and retire all year long.

As always, if you have any Regional concerns or comments you would like to share, please feel free to email me at You can also find me on Twitter @garycarrhalton, LinkedIn or Facebook. To receive further updates on Regional issues, please subscribe to my quarterly e-newsletter, “The Carr Report”.