Lungworm in dogs

By
✔ MRCVS
BSc
BVM&S
FHEA
Updated October 16, 2025
6 min read

Overview

Symptoms

Risk

Diagnosis

Vet treatment

Home treatment

Prevention

When to worry

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Lungworm in dogs

By
✔ MRCVS
BSc
BVM&S
FHEA
Updated October 16, 2025
6 min read

Lungworm in dogs is a serious and potentially fatal disease. Dogs get infected by eating slugs or snails carrying larvae of the parasite Angiostrongylus. Common symptoms include coughing, breathing problems and unexplained bruising. Young, curious dogs and puppies are most at risk.

87% of UK vets have seen cases of lungworm in dogs, with 30% reporting deaths. The numbers and spread of cases are increasing every year. Symptoms of lungworm are varied and early stages are easily-mistaken for other illnesses. The best way to protect your dog against lungworm is with regular preventive care, using a vet-prescribed wormer. Always seek prompt veterinary advice if your dog develops a new and persistent cough or unexplained bruising.

What is Lungworm in dogs? >What is Lungworm in dogs? [Overview

Symptoms of Lungworm infection in dogs >Symptoms of Lungworm infection in dogs [Symptoms

Which dogs are most likely to get lungworm? >Which dogs are most likely to get lungworm? [Risk

How do vets diagnose Lungworm in dogs? >How do vets diagnose Lungworm in dogs? [Diagnosis

How do vets treat Lungworm in dogs? >How do vets treat Lungworm in dogs? [Vet treatment

How to look after a dog with Lungworm at home >How to look after a dog with Lungworm at home [Home treatment

How to prevent Lungworm in dogs >How to prevent Lungworm in dogs [Prevention

When to worry about Lungworm in your dog >When to worry about Lungworm in your dog [When to worry

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