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Living with Gnathomiasis

A parasite infection from eating raw or undercooked animals such as fish, eels, frogs, birds, or reptiles, found commonly in Southeast Asia.

Understanding Gnathomiasis

Gnathomiasis is an infection caused by roundworms (nematodes) of the genus Gnathostoma.

It is commonly found in Southeast Asia and spreads by eating contaminated raw or undercooked birds, eels, fish, frogs, or reptiles. Symptoms depend on the species. They come from larvae moving through the body.

Signs & symptoms

Symptoms depend on the species. GARD describes these:

  • Painful, itchy swellings under the skin
  • Lung changes
  • Eosinophilic meningitis (inflammation around the brain)
  • Raised eosinophils (a type of white blood cell) in the blood

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
Which species of Gnathostoma caused my infection?
Which treatments are used for this infection?
How can I avoid getting it again?

Quick facts

It is caused by Gnathostoma roundworms, which spread to people who eat contaminated raw or undercooked animals.

Also known as: gnathostomiasis; gnathostomosis; infection by gnathostoma; infection caused by gnathostoma; infectious disease by gnathostoma

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · GnathomiasisGARD ID 9286 · 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 Gnathomiasis.

Explore the Gnathomiasis blog

Explore research for Gnathomiasis

Explore actively recruiting Gnathomiasis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Gnathomiasis 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 Gnathomiasis 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 Gnathomiasis experiences more deeply and prepare for better conversations with your doctors and care team.

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