How Pets Get Heartworm Disease: What You Need to Know.

Heartworm disease is a serious and potentially fatal condition that affects pets, particularly dogs, cats, and ferrets. It is caused by Dirofilaria immitis, a parasitic worm that lives in the heart, lungs, and blood vessels of infected animals. But how do pets actually get heartworm disease?

The Mosquito Connection

The primary culprit in the spread of heartworm disease is the mosquito. Here’s how it happens:

1. An infected animal serves as a host. When a mosquito bites an infected dog, coyote, fox, or other wild animal, it picks up microscopic baby worms (microfilariae) circulating in the blood.

2. The mosquito acts as a carrier. Over the next 10–14 days, these microfilariae mature into infective larvae inside the mosquito.

3. A bite transmits the larvae. When the mosquito bites another pet, it deposits the larvae onto the skin, allowing them to enter the bloodstream through the bite wound.

4. The worms grow and multiply. Once inside the pet, the larvae travel to the heart and lungs, maturing into adult worms over the next six months. A fully grown heartworm can reach up to 12 inches in length!
   

Why Prevention is Key

Because heartworms cause severe damage to the heart, lungs, and arteries, prevention is far easier (and safer) than treatment. Monthly heartworm preventatives, regular vet check-ups, and reducing mosquito exposure can help protect your furry friend from this dangerous disease.

If you’re unsure about your pet’s heartworm status, schedule a veterinary check-up today. A little prevention can save a lot of heartache! 🐶🐱💙