Pet Health

Lungworm infection in dogs

Discover essential information about lungworm infections in dogs, including symptoms, treatment options, and prevention tips to keep your furry friend safe and healthy!
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
A close-up of a veterinarian examining a dog for lungworm infection symptoms.

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As a dog owner, you want your furry friend to live a long, healthy, and happy life. But what happens when a silent threat like lungworm infection sneaks in? This parasitic condition can cause serious health issues in dogs, leaving many pet parents worried and unsure about what to do next. Let’s break down everything you need to know about lungworm, how to spot it, and how to protect your pup.

⚠️ What to Watch For

Lungworm infections can present with a range of symptoms, and early detection is critical. Unfortunately, these signs are often subtle and can be mistaken for other conditions. Here are the most common symptoms to watch for:

  • Coughing or difficulty breathing
  • Lethargy or reduced energy levels
  • Weight loss or poor appetite
  • Bleeding issues, such as nosebleeds or excessive bruising
  • Vomiting or diarrhea
  • Seizures or unusual behavior

These symptoms may vary depending on the severity of the infection and your dog’s overall health. If you notice any of these signs, it’s time to investigate further.

🔍 Possible Causes

So, what exactly is lungworm, and how do dogs get infected? Lungworm is a parasitic worm (Angiostrongylus vasorum) that primarily targets dogs and foxes. The parasite’s larvae are carried by slugs and snails, which dogs can accidentally ingest while exploring their environment. Even drinking water contaminated by slugs or snails can lead to infection.

Once inside your dog’s system, the larvae travel through the bloodstream to the lungs and heart. There, they mature into adult worms and reproduce, causing a range of health problems. Factors that increase the risk of lungworm exposure include:

  • Frequent outdoor activities, especially in damp or wooded areas
  • Dogs that eat grass, drink from puddles, or chew on outdoor toys
  • Living in or visiting regions where lungworm is common

✅ What You Can Do at Home

Preventing lungworm is much easier than treating it. While there’s no way to completely eliminate the risk, you can take steps to minimize your dog’s exposure and keep them safe:

  • Pick up and clean outdoor toys regularly to avoid contamination from slugs or snails.
  • Keep your dog on a lead or supervise them in areas where slugs and snails are common.
  • Prevent your dog from eating grass, drinking from puddles, or scavenging outdoors.
  • Use a regular worm prevention treatment prescribed by your vet. Not all wormers cover lungworm, so make sure to choose one that does.

While prevention is key, monitoring your dog for symptoms and acting quickly if you suspect lungworm can make a big difference.

💡 When to Call a Vet

If you suspect your dog may have lungworm, it’s essential to contact your veterinarian right away. Lungworm infections can worsen quickly if left untreated, potentially leading to life-threatening complications like heart failure or severe bleeding disorders.

Your vet will likely recommend diagnostic tests, such as a blood test or fecal analysis, to confirm the presence of lungworm. Treatment usually involves specific anti-parasitic medications, which are highly effective when given early. In more severe cases, additional care like oxygen therapy or blood transfusions may be necessary.

Don’t wait—early intervention can save your dog’s life.

FAQs

Q: How do I know if my dog is at risk for lungworm?
A: Dogs who spend a lot of time outdoors, especially in areas with slugs and snails, are at higher risk. Even a single exposure to contaminated water or vegetation can lead to infection.

Q: Can lungworm be passed to humans?
A: No, lungworm infections in dogs cannot be transmitted to humans. However, it’s always a good idea to practice proper hygiene when handling pets.

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References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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