Test library
White-Faced Hornet Allergy Blood Test
The White-Faced Hornet Allergy Test measures IgE antibodies to white-faced hornet venom in a blood sample. It helps assess whether a person has become sensitized after a sting or a suspected sting reaction.
Order White-Faced Hornet 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 White-Faced Hornet Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The White-Faced Hornet Allergy Test is a blood test that detects IgE antibodies against the venom of the white-faced hornet, also known as the bald-faced hornet. Venom testing is usually considered after a sting causes a reaction beyond ordinary pain and swelling, such as hives, breathing trouble, or dizziness. The test helps show whether the immune system has been sensitized to this insect's venom, and it is interpreted together with the details of the sting reaction.
What this test measures
Insect venom can trigger an immune response in which the body produces IgE antibodies against proteins in the venom. Once sensitized, a later sting may cause symptoms that range from local swelling to a systemic reaction involving the skin, breathing, or circulation. Measuring venom-specific IgE helps clarify whether sensitization is present after a reaction.
The sample is a blood draw, and the laboratory measures IgE binding to white-faced hornet venom. Results are reported as a concentration, often in kilounits per liter, and as a graded class. Detectable IgE confirms sensitization but does not by itself predict how severe a future sting reaction would be, which is why the clinical history matters so much.
People who have had a systemic reaction to a sting, outdoor workers, and anyone with repeated stings may be offered venom testing. White-faced hornets belong to the same insect family as yellow jackets and yellow hornets, so a broader venom panel sometimes shows reactions to more than one species. A qualified healthcare provider should interpret the results.
- White-faced hornet (Dolichovespula maculata) venom-specific IgE antibodies
- Venom-specific IgE concentration reported in kU/L
- Graded IgE antibody class result
- Total serum IgE when included
- Blood eosinophil count when included
- Related yellow jacket and yellow hornet venom IgE when a panel is included
Why people order this test
- Assess sensitization after a systemic reaction to a hornet sting
- Evaluate unusually large or persistent reactions to a sting
- Help distinguish white-faced hornet sensitivity from other vespid venoms
- Provide information for a venom allergy discussion with a clinician
- Support testing for people with high outdoor or occupational exposure
- Clarify results when a broader insect venom panel is ordered
How to prepare
No fasting is required for this blood test. Follow the collection instructions provided by the laboratory, and tell the testing provider about the sting history and any medications you take, since some medications can affect allergy test interpretation.
Understanding your results
Results are usually available within one to three business days. A detectable venom-specific IgE level indicates sensitization to white-faced hornet venom, but the risk of a future reaction is judged from the sting history as well as the laboratory finding. A qualified healthcare provider can review both together.
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Frequently Asked Questions
What is a systemic reaction to a sting?
A systemic reaction involves symptoms beyond the sting site, such as hives, swelling away from the bite, breathing difficulty, stomach upset, or dizziness. These symptoms require prompt medical attention.
Is a large swollen area an allergy?
A large local reaction stays around the sting site and can be uncomfortable, but it is different from a systemic allergy reaction. Testing may still be considered when reactions are severe or repeated.
What is the difference between a white-faced hornet and a yellow jacket?
They are related vespids with different venom proteins. A venom panel can show whether IgE reacts to one or several species, which helps with interpretation.
How soon after a sting should testing be done?
Timing is usually discussed with a healthcare provider. Testing too soon after a reaction or long after the last exposure can both affect how results are interpreted.
Can the test predict how severe my next reaction will be?
No. The level of venom-specific IgE does not reliably predict reaction severity. The provider considers the previous reaction, overall health, and other factors.
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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