Test library
Swordfish Antibody Test
A swordfish allergy blood test measures IgE antibodies against swordfish proteins. It helps investigate reactions such as itching, hives, or swelling after eating this fish.
Order Swordfish Allergy Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Swordfish Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The swordfish allergy test is a blood test that measures immunoglobulin E antibodies against proteins in swordfish. It is ordered when eating swordfish or dishes containing it is followed by symptoms such as itching, hives, swelling, or digestive upset. Fish allergy can be lifelong and may be triggered by several species, so testing helps clarify which fish the immune system recognizes. A qualified healthcare provider interprets the result with the person's history.
What this test measures
Fish allergy is one of the more common food allergies, and it is often lifelong. Swordfish is a large predatory fish eaten grilled, seared, or in steaks. Its muscle protein parvalbumin is a major allergen shared across many fish species, so reactions to swordfish can occur alongside reactions to other fish. Some people react only to specific species.
The test measures allergen-specific IgE in serum using a laboratory immunoassay. It reports a quantitative level and typically a reactivity class for swordfish. A single blood draw is enough, and the test can be combined with other fish tests to reveal whether sensitization is broad or limited to particular species.
People who notice repeat symptoms after eating fish, those with reactions to multiple seafood types, and anyone undergoing a food allergy evaluation may be offered this test. A positive result shows sensitization rather than confirming that symptoms are caused by swordfish, so clinicians interpret it with a detailed history and other testing.
- Swordfish-specific IgE antibodies
- Fish parvalbumin allergen components
- Quantitative allergen-specific IgE level
- IgE reactivity class for swordfish
- Total serum IgE
- Cross-reactive fish allergens
- Related seafood allergens within the panel
Why people order this test
- Investigate reactions after eating swordfish
- Distinguish swordfish allergy from reactions to other fish
- Support a broader seafood allergy evaluation
- Check for cross-reactivity across fish species
- Provide objective information before discussing dietary changes with a provider
- Follow up on unexplained hives or swelling after fish meals
How to prepare
No fasting is required. A blood sample is drawn from a vein, usually at the arm. Follow any instructions provided by the laboratory.
Understanding your results
Results are usually available within one to three business days. The report shows the specific IgE level and a reactivity class for swordfish. An elevated result suggests sensitization, and a qualified healthcare provider interprets it with the person's symptoms.
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Frequently Asked Questions
Is swordfish allergy common?
Fish allergy affects a small share of adults and children. Swordfish can trigger reactions, and some people react to multiple fish species because of shared proteins.
How is the test done?
A blood sample is drawn and analyzed for IgE antibodies that react to swordfish proteins.
Do I need to fast?
No fasting is required for this blood test unless it is bundled with another test that needs it.
What does a positive result mean?
It indicates the immune system has produced antibodies against swordfish. Whether symptoms occur depends on exposure and sensitivity, which a provider evaluates.
Can I be allergic to one fish and not another?
Yes. Some people react to only certain species, while others react broadly because many fish share the allergen parvalbumin. Testing several fish can clarify the pattern.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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