🦟 Heartworm Disease: What Every Pet Owner Should Know

Heartworm disease is one of the most serious (and most preventable) illnesses we see in veterinary medicine. Unfortunately, many pet owners don’t realize how easily it can happen.

At Animal Clinic of Whiteford, we strongly recommend heartworm prevention because once a pet becomes infected, treatment is much harder on their body than simply preventing the disease in the first place.

Let’s talk about what heartworm disease is and why prevention is so important.

What Is Heartworm Disease?

Heartworm disease is caused by parasitic worms that live in the heart, lungs, and blood vessels of infected animals. These worms can grow up to 12 inches long and can cause serious damage to the heart and lungs over time.

-The disease most commonly affects dogs, but cats and other animals can be infected as well.

-Without treatment, heartworm disease can eventually become life-threatening.

How Do Pets Get Heartworms?

Heartworms are spread through mosquito bites. When a mosquito bites an infected animal, it picks up microscopic heartworm larvae. When that mosquito bites another pet, it can transmit those larvae into the bloodstream. Over several months, the larvae grow into adult worms that settle in the heart and lungs. This means it only takes one infected mosquito for a pet to become infected.

“My Pet Stays Indoors — Are They Still at Risk?”

Yes.

Mosquitoes can easily enter homes through:

-open doors

-windows

-garages

-brief trips outside

Because mosquitoes are the carrier, even mostly indoor pets can be exposed. In our region of Maryland and southern Pennsylvania, mosquitoes are common during the warmer months, which means heartworm prevention is an important part of routine care.

Signs of Heartworm Disease

In the early stages, many pets show no obvious symptoms, which is why testing and prevention are so important.

As the disease progresses, dogs may develop:

-Persistent cough

-Fatigue after exercise

-Difficulty breathing

-Weight loss

-Decreased appetite

In severe cases, heartworm disease can lead to heart failure. Cats may show more subtle or sudden symptoms, including respiratory distress.

Prevention Is Much Easier Than Treatment

Heartworm prevention is simple and highly effective. Most preventatives are given monthly and work by eliminating the immature stages of heartworms before they can grow into adult worms.

Treatment for heartworm disease in dogs, on the other hand, involves:

-Multiple injections

-Strict exercise restriction for several weeks

- Follow-up testing and monitoring

It can be stressful for both pets and their families. That’s why prevention is always the better option.

Annual Heartworm Testing

Even pets that are on prevention should be tested annually. This helps ensure the medication is working properly and that your pet remains protected.

Routine testing is a normal part of preventative care and helps us catch problems early if they arise.

Protecting Your Pet

Heartworm disease is serious, but the good news is that it is almost entirely preventable.

Keeping your pet on consistent prevention and scheduling regular wellness exams helps ensure they stay healthy and protected year-round.

If you have questions about heartworm prevention or testing, our team is always happy to help.

🐾 Because prevention is one of the best ways we can protect the pets we love 💕

“Created by God, Loved by You, Cared for by Us”

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