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Living with Dirofilariasis

An infection from Dirofilaria roundworms, passed by mosquito bites, that can cause skin nodules or lung nodules.

Understanding Dirofilariasis

Dirofilariasis is an infection caused by Dirofilaria roundworms, which humans catch from mosquito bites.

The natural hosts of the roundworms are dogs, wild canids like wolves and foxes, and raccoons. Signs generally include nodules under the skin or small lung nodules (granulomas), which may cause no symptoms. GARD lists onset any time in life.

Signs & symptoms

Symptoms vary from person to person. GARD's summary lists these:

  • Nodules under the skin
  • Lung nodules (granulomas)
  • Cough
  • Chest pain
  • Fever and chills
  • Wheezing

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
How are nodules checked to confirm dirofilariasis?
Does the nodule need to be removed?
How can I lower my chance of mosquito bites?

Quick facts

Symptoms usually startany time in life

It is caused by Dirofilaria roundworms. Humans are infected with larvae through mosquito bites.

Infectious

Also known as: dirofilaria caused disease or disorder; dirofilaria disease or disorder; dirofilaria infectious disease; dirofilariosis; infection by dirofilaria; infection caused by dirofilaria

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · DirofilariasisGARD ID 11908 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Dirofilariasis.

Explore the Dirofilariasis blog

Explore research for Dirofilariasis

Explore actively recruiting Dirofilariasis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Dirofilariasis with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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I can help you find recruiting Dirofilariasis studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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HealthStory evolves private journaling with a living AI journal that talks back and asks thoughtful questions, helping you capture your Dirofilariasis experiences more deeply and prepare for better conversations with your doctors and care team.

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