YOUR HEALTHTicks & Mosquitoes

Insects and bugs that bite, like mosquitoes and ticks, can spread diseases to humans. The most common diseases spread by bugs in Ontario are West Nile virus, which is spread by mosquitoes, and Lyme disease, which is spread by blacklegged ticks. These diseases are treatable if you know what to look for and seek medical attention.

CK Public Health works to reduce your risk of getting sick from diseases spread by bugs. Check out the information below to find steps you can take to protect yourself.



Lyme Disease

Blacklegged ticks can spread Lyme disease in Ontario. Blacklegged ticks, which are sometimes called deer ticks, are commonly found in wooded or brushy areas, however, there is a possibility of finding them anywhere. In Chatham-Kent, populations of blacklegged ticks carrying Lyme disease have been identified in Rondeau Provincial Park and wooded areas near Thamesville.

    Woman tourist applying mosquito repellent on hand during hike in nature.

    If you find a blacklegged tick attached to you:

    • Remove the tick as soon as possible by pulling directly away from you using a pair of fine-point tweezers, grasping the tick close to your skin. 
    • Try to establish how long the tick may have been attached.
    • If the tick is blacklegged and may have been attached for more than 24 hours, consult with a health care provider or pharmacist as soon as possible.
    • Monitor yourself for signs and symptoms for 30 days. 

          In some cases physicians, nurse practitioners and pharmacists can prescribe a preventive dose of antibiotics to help reduce the chance of acquiring Lyme Disease. 



          West Nile Virus

          Most mosquitoes in Ontario are a nuisance, but some can carry and spread diseases. Certain mosquitoes can carry West Nile virus. A bite from an infected mosquito can transmit the virus to people.

          Tourist spraying insect repellent on her legs and hiking boots.

          Most people infected with West Nile virus have no symptoms. For those that get sick, the first symptoms usually appear within 2 to 15 days after infection. Some people have mild symptoms that can include: 

          • Fever 
          • Headache 
          • Body aches 
          • Mild rash 
          • Swollen lymph glands 

          In rare cases, infected people will develop severe symptoms and health effects. Serious symptoms can include: 

          • Rapid onset of severe headache 
          • High fever 
          • Stiff neck 
          • Nausea and/or vomiting
          • Difficulty swallowing 
          • Drowsiness 
          • Confusion 
          • Loss of consciousness 
          • Lack of coordination 
          • Muscle weakness 
          • Paralysis 

          See a health care provider immediately if you develop symptoms of West Nile virus after being bitten by a mosquito. 

            

          Mosquito Surveillance Bulletin

          Mosquito surveillance data is available in an easy to read online reporting bulletin. Data includes the number of mosquitoes collected per trap site, number of West Nile virus vector species identified per trap site, and positive mosquito pools per trap each week.

          View Bulletin