West Nile Virus and other Mosquito-Borne Diseases Surveillance in Canada: Annual edition 2018 (infographic)
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Organization: Public Health Agency of Canada
Date published: 2020-04-03
Related topics
What is the risk
- West Nile virus (WNV) is the leading cause of domestically acquired mosquito-borne diseases (MBDs) in Canada.
Who's at greater risk
- Advanced age and people with pre-existing medical conditions such as diabetes, cancer, and heart disease are at greater risk of WNV neurological syndrome.
How to manage
- There is no specific treatment or vaccine for WNV.
- Patients are treated for their symptoms.
WNV transmission
- Birds that are infected with WNV can spread the disease to the mosquitoes that bite them.
- These mosquitoes then spread the virus to humans, animals and back to bird populations.
- Only birds and mosquitoes can carry on the cycle of WNV.
- Humans and animals cannot spread the virus to other humans or animals.
Facts reported in 2018
- 170 dead wild birds tested positive for WNV.
- 571 mosquito pools tested positive for WNV.
- 123 horses tested positive for WNV.
- A higher number of WNV-positive birds, mosquitoes and horses were observed when compared to the previous 5 years.
- 432 humans tested positive for WNV in Canada:
- 29 people died from WNV infection.
- 238 people suffered neurological illnesses.
- The reported number of WNV-positive humans (probable and confirmed diagnoses) in Canada has continuously risen since the year 2014.
- slight decline in the number of reported cases between 2013 and 2014
Other MBDs
- 72 human cases of California serogroup viruses (CSGV) were detected in Canada.
- 13 horses tested positive for Eastern equine encephalitis virus (EEEV) in Canada.
Public health recommendations
- Avoid becoming infected with WNV and other MBDs by:
- Protecting yourself:
- cover exposed skin.
- use insect repellent.
- Reducing surrounding risk :
- eliminate standing water.
- maintain window and door screening.
- Protecting yourself:
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