Lungworm in Cats: Risks, Symptoms & Prevention
Lungworm infection in cats is a parasitic condition caused primarily by Aelurostrongylus abstrusus. It affects the respiratory system and presents increasing risks across the UK, especially for outdoor and hunting cats. Understanding lungworm’s lifecycle, symptoms, diagnosis, and prevention is vital for every cat owner who wants to keep their feline companion healthy and safe.
What is lungworm and how do cats get infected?
Lungworms are small parasitic roundworms that live in the lungs and airways of infected cats. Unlike the lungworms that infect dogs, the most common lungworm in cats is Aelurostrongylus abstrusus, although other species such as Eucoleus aerophilus can also occur.
The infection cycle begins when cats ingest lungworm larvae, usually by hunting and eating intermediate hosts such as rodents, birds, frogs, snakes, snails, or slugs. These animals carry the larvae that then travel through the cat's body, reaching the lungs where they mature into adults and reproduce.
Adult worms lay eggs that hatch into larvae inside the lungs. The cat coughs up the larvae, swallows them, and passes them out in faeces. Those larvae infect slugs or snails again, continuing the life cycle.
Because hunting behaviour exposes cats to these hosts, outdoor and free-roaming cats are at the highest risk. Indoor cats have a much lower likelihood of infection, although it is not impossible.
Many cats may carry lungworms without obvious symptoms and can develop immunity over time, expelling the worms naturally. However, this is not guaranteed and the presence of lungworms can still cause damaging respiratory effects.
Symptoms of lungworm infection in cats
Symptoms can range from none to severe and sometimes be mistaken for other respiratory illnesses. Watch for these signs in your cat:
- Persistent coughing, especially a chronic or hacking cough
- Noisy, laboured or wheezy breathing
- Gasping or struggling for air
- Rapid or heavy breathing
- Weight loss or loss of appetite over a short period
- Reduced activity or lethargy
Because many symptoms resemble feline influenza or bronchitis, a vet will usually consider lungworm as a possibility when diagnosing respiratory problems, particularly in outdoor cats or prolific hunters.
How is lungworm diagnosed in cats?
Diagnosing lungworm in cats can be challenging. Unlike dogs, there is no simple blood test available for feline lungworm. Instead, your vet may take the following steps:
- Examine a sample of your cat's faeces using techniques such as the Baermann method to detect lungworm larvae.
- Use chest X-rays to assess lung inflammation or damage caused by parasites.
- In some cases, perform a bronchoscopy to look inside the airways directly.
The process may require multiple tests to confirm the diagnosis, given the similarity of symptoms to other respiratory diseases.
Treatment and prevention of lungworm in cats
If your cat is diagnosed with lungworm, treatment is usually effective if started promptly. Antiparasitic medications such as fenbendazole or milbemycin oxime are commonly prescribed. Spot-on treatments are also available that protect against lungworm as well as fleas and ticks.
Prevention is always preferable to treatment. Limiting your cat's access to potential intermediate hosts by supervising outdoor time and reducing hunting opportunities can lower the risk. Discuss with your vet about adding lungworm protection to your cat's regular flea and worming programme, especially if your cat goes outdoors.
Why responsible cat ownership matters
Protecting your cat from lungworm promotes not only their health but also helps minimise the spread of this parasite in the environment. Regular vet check-ups, preventive treatments, and awareness of symptoms are essential parts of responsible pet ownership.
For owners considering a new cat, it’s equally important to obtain pets from reputable breeders or shelters to ensure good health standards and reduce the risk of parasitic infections.
Summary and next steps
Lungworm is now a widespread parasite in the UK, affecting many cats especially those who hunt outdoors. Being informed about the risks, recognising symptoms early, and practising preventative care can greatly reduce the impact of lungworm on your feline friend.
Consult your vet for advice about lungworm prevention products and diagnostics if you notice any respiratory issues in your cat. With proper care, lungworm is manageable, ensuring your cat enjoys a healthy life.
For more about responsible cat ownership and keeping your pet safe, visit trusted veterinary sources and local professionals.
Also, if you are interested in Maine Coon kittens or other popular breeds, always seek out reputable breeders or adoption centres to promote ethical and healthy pet placements.
