Heartworms aren’t just a seasonal worry—they’re a serious, preventable threat to our dogs. While mosquitoes are mostly just an itchy nuisance to us humans, they can transmit heartworm disease to dogs with a single bite. Once infected, heartworms can grow up to a foot long and cause lasting damage to the heart, lungs, and blood vessels.
The good news: prevention is easy, safe, and far cheaper than treatment. Check in with your veterinarian to make sure your dog is protected year‑round.
Want to learn more? Visit the American Heartworm Society at heartwormsociety.org. You can also see the most recent 3‑year heartworm incidence map here: https://d3ft8sckhnqim2.cloudfront.net/images/2026/04/2025%20incidence%20map.png
Let’s keep our pets safe and healthy.
The vector of canine heartworm disease is the Western treehole mosquito (Aedes sierrensis). This species is common in Jackson County, particularly in spring and early summer.
Where It Lives
Treehole mosquitoes prefer to lay eggs in natural tree cavities.
These cavities form when parts of the tree decays or when old trunks and limbs break down over time. As these cavities collect water, they become ideal breeding sites for this species. Even small amounts of water — sometimes as little as a few ounces — can support hundreds of larvae.
You’ll often find treehole mosquitoes in and around:
- Neighborhoods with mature oak and madrone trees
- Shaded yards with water‑holding containers that mimic natural tree holes
We Can Help
If you’re dealing with mosquitoes around your home — especially if you live near oak or madrone trees — give us a call 541-826-2199. Our trained technicians can:
- Inspect your property for potential mosquito breeding sites
- Identify whether treehole mosquitoes are present
- Recommend or apply appropriate control measures
- Provide guidance on long‑term prevention
We’re here to help reduce mosquito populations and make your outdoor spaces more comfortable.
Learn more about what Jackson County Vector Control does visit our website at jcvcd.gov
