August 16, 2006

A recent human case of West Nile Virus (WNv) at Northwestern Health Unit has prompted officials at the Thunder Bay District Health Unit to provide information about WNv to residents in our area.

Thunder Bay District Health Unit surveillance has identified several dead birds infected with WNv, but  no positive mosquito pools or human cases.

Transmission occurs from the bite of infected mosquitoes.  Approximately 80 per cent of people bitten by an infected mosquito do not show any symptoms.  Of those who show symptoms, most will experience mild illness including fever, headache, body aches, nausea, vomiting and rash on chest, stomach or back.  Less than one percent of infected people will experience serious symptoms including high fever, severe headache, muscle weakness, stiff neck, and confusion. 

Some simple precautions, which can be taken, include:

• Minimize time spent outdoors between dusk and dawn
  
• Wear clothing that is light in colour and heavy enough to prevent bites. Long pants and long sleeved shirts are best when outdoors for extended periods of time.
  
• Apply mosquito repellents when outdoors.  Consider using federally registered personal insect repellents, such as those containing DEET.
• Be sure to follow the directions for its use, especially for children.
  
• Make sure all doors and windows in your home are tight fitting or properly screened to keep mosquitoes out.
  
• Remove standing or stagnant water from around your home.
  

For more information about WNV visit www.tbdhu.com .

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