Feline Heartworm Myrtle Beach, SC

Feline Heartworm Disease: What Every Cat Owner Should Know

While heartworm disease is more commonly associated with dogs, cats are also at risk. Although less common in felines, heartworm disease can be severe, and even fatal, making prevention and early detection essential for protecting your cat’s health.

What Is Heartworm Disease in Cats?

Heartworm disease is caused by a parasitic roundworm that lives in the heart and lungs. Cats are not natural hosts, so even a small number of worms, or just one, can cause significant damage. As the immature worms migrate through the body, they often trigger inflammation in the lungs, leading to asthma-like symptoms.

How Do Cats Get Heartworm?

Heartworms are transmitted through mosquito bites. When a mosquito carrying heartworm larvae bites your cat, it can infect them. Over several months, the larvae mature and travel to the heart and pulmonary arteries.

Unlike intestinal parasites, heartworms are not visible in your cat’s stool. By the time worms reach adulthood, the disease can become life-threatening.

Signs and Symptoms

Heartworm disease in cats often mimics feline asthma, making it difficult to recognize. Symptoms can range from mild to severe and may include:

• Coughing
• Labored or rapid breathing
• Open-mouth breathing or panting
• Vomiting (sometimes with blood)
• Lethargy
• Weight loss
• Loss of appetite
• In severe cases, collapse, seizures, or sudden death

Some cats may show no symptoms at all until the disease is advanced.

Why Early Detection Matters

Early detection is critical because the damage caused by heartworms, especially in the lungs, is often permanent. Unfortunately, there is no safe, conventional treatment for adult heartworms in cats.

When adult worms die, they can trigger a severe inflammatory response that may be fatal. Because of this, prevention is the safest and most effective way to protect your cat.

How Is Heartworm Diagnosed?

Diagnosing heartworm disease in cats can be challenging and often requires multiple tests, including:

• Blood tests (antigen and antibody testing)
• X-rays (radiography)
• Ultrasound of the heart (echocardiography)

Routine testing helps detect infection early and reduce the risk of serious complications.

Prevention Is Essential

Our veterinarians and the American Heartworm Society recommend year-round heartworm prevention for all cats. Preventive options include topical and oral medications, often combined with protection against other parasites.

Even indoor cats are at risk, just one infected mosquito entering your home can transmit the disease.

Our Commitment to Your Pet’s Health

At Dunes Veterinary Clinic, we are dedicated to providing high-quality care to keep your pets safe and healthy. Our team offers comprehensive testing, guidance, and preventive treatments to protect your cat from heartworm disease. Protect your cat before it’s too late. Because heartworm disease is difficult to detect and nearly impossible to treat in cats, consistent prevention is the best defense. If you have questions about heartworm prevention, contact our team today. We’re here to help keep your feline companion safe!