Heartworm disease in dogs: how to protect your dog in Greece

Heartworm disease is caused by a parasite spread by mosquito bites. The larvae grow inside the dog into worms that live in the heart and the blood vessels of the lungs. It is present in many parts of Greece, particularly near rivers, lakes and wetlands.

Why prevention matters so much

Symptoms appear late, when the worms have already caused damage. Treatment is long, requires weeks of restricted exercise and carries risks. Prevention, on the other hand, is simple and affordable.

Symptoms

• a persistent cough
• tiring easily, reluctance to walk
• weight and appetite loss
• in advanced stages, breathing difficulty and a swollen belly

Diagnosis

A quick blood test at the clinic. It's done before starting prevention in a dog that wasn't on it, and then at regular intervals as your vet advises.

Prevention

• A monthly tablet or spot-on, during mosquito season or all year.
• A yearly injection covering the whole year, in some cases.
• Fewer bites: screens, dog-safe repellents, and no standing water in the yard.

Many products cover heartworm, fleas and intestinal worms together. Your vet will suggest the most practical combination.

What about cats?

Cats are infected less often, but even a few worms can cause serious breathing problems. Ask your vet whether your cat needs prevention too.

Is your dog coughing? See when a cough is urgent. For testing and prevention, book a vet.

Frequently asked questions

Can heartworm pass from dog to dog?

Not directly. It needs a mosquito to spread.

Is a test needed before starting prevention?

Yes, for an adult dog that wasn’t on prevention. If it is already infected, your vet needs to know before giving any product.

Can heartworm be treated?

Yes, in most cases, but treatment is long and requires strict rest. Prevention is far simpler.