Five locals in Halton have been diagnosed with the West Nile virus.
In a recent development, five residents of Halton Region, Ontario have tested positive for West Nile Virus, marking the first human cases for the region in 2025. This news comes shortly after the first human cases were registered in the area of Oristano, Sardinia, Italy.
According to Dr. Patrick Galange, Halton Region Associate Medical Officer of Health, these cases serve as a reminder for residents to take precautions against mosquito bites. He advises individuals to protect themselves and their families until the fall frost.
West Nile Virus is a disease primarily transmitted by mosquitoes. Approximately 80% of individuals infected with the virus will have no symptoms. However, about one in a hundred people may develop a severe illness affecting the central nervous system. This severe illness may present as encephalitis (inflammation of the brain) or meningitis (inflammation of the membranes that surround the brain and spinal cord).
Symptoms of West Nile Virus can include fever, headache, body aches, joint pains, vomiting, diarrhea, or rash. To reduce the risk of West Nile Virus, Halton Region Public Health is working to educate the public and implement preventative programs such as larviciding.
Residents are encouraged to take measures to prevent mosquito bites. This includes wearing light-colored, long-sleeved shirts and pants with tightly-woven fabric when going outside during dusk and dawn, and in shady, wooded areas. Using an approved insect repellent, such as one containing DEET or Icaridin, is also recommended.
To further reduce mosquito-breeding sites, residents are advised to get rid of all water-filled containers and objects around their homes. Changing the water in bird baths at least once per week is also important.
In addition, ensuring window and door screens are tight and without holes, cuts, or other openings can help prevent mosquitoes from entering homes. For more information about personal protection and Halton Region's surveillance and control efforts, visit the West Nile Virus page on halton.ca.
Residents are also encouraged to report standing water on public property by calling 311. By working together, we can help reduce the risk of West Nile Virus in our community. Stay safe and protect yourself and your loved ones.
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