1. Know Your Pests: What’s Dangerous in Southern Ontario?
- Blacklegged (“deer”) ticks — can carry Lyme disease; early symptoms include fever, headache, fatigue, joint pain, and an expanding red rash (often a “bull’s-eye”).
- Mosquitoes — while most bites are just itchy annoyances, some species can potentially spread West Nile virus; symptoms to monitor include flu-like signs after a bite.
- Horse flies — aggressive and painful biters; in rare cases can cause serious allergic reactions or transmit tularemia (a bacterial infection).
2. Prevention Tips & Tricks
- Dress smart: Wear light-colored, tightly woven clothing, long sleeves, pants, socks—and tuck your pant legs into your socks to keep ticks at bay.
- Use repellents correctly:
- Apply DEET (20–30%) to exposed skin. If using sunscreen, apply it first, let it dry, then apply repellent.
- Pre-treat clothing with a bug spray with DEET prior to wearing
- Use pet-safe repellent on your pets. Don’t forget – they can be bit too!
- Camp smart:
- Avoid shady, moist areas and water edges where biting insects thrive.
- Use citronella or bug nets, and enjoy your campfire—smoke helps keep bugs away (always check fire bans first).
- Home base prep: Remove standing water and keep vegetation trimmed to reduce mosquito breeding around your campsite or property.
3. First Aid & Aftercare
- Ticks:
- Perform daily “tick checks” after being outdoors—especially around armpits, groin, hairline, and behind knees.
- To remove: use fine-tipped tweezers, grasp close to skin, pull upward steadily—don’t twist, then wash with soap and water.
- Ensure any pets tagging along are up to date on their flea and tick medications.
- Bites or mild stings:
- Clean the area, apply a cold compress to reduce swelling, and take antihistamines or use hydrocortisone/calamine to soothe itching.
- Severe reactions:
- Watch for signs of anaphylaxis—difficulty breathing, swelling of lips/throat, dizziness. Seek emergency help immediately.
- Horse fly bites:
- These bites are painful; treat them similarly—clean, cool, and monitor for infection or severe allergic reaction—tularemia is rare but treatable with antibiotics.
4. Quick Summary
| Bug Type | Risks | Prevention Tips |
|---|---|---|
| Deer Ticks | Lyme disease, rash | Clothing, permethrin, daily checks, prompt removal, pets up-to-date on their flea and tick medications |
| Mosquitoes | Itchiness, possible virus | Repellent, avoided zones, reduce standing water |
| Horse Flies | Painful, allergic reactions | Protective clothing, repellent, avoid breeding areas |
Stay safe and bite-free during your next adventure! Knowledge and preparation are your best defences.

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