blood-test

Allergen – Peanut

₹1,200.00

15 minutes
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The Peanut Allergy Test is a diagnostic test used to detect an allergic reaction to peanuts. This can be done through:
1. Blood Test (Specific IgE test):
o Measures the level of IgE antibodies in the blood that react specifically to peanut proteins.
o Often labeled as Peanut-specific IgE or RAST test.
2. Skin Prick Test (SPT):
o A small amount of peanut extract is introduced into the skin (usually the forearm or back) using a tiny needle.
o A raised bump (wheal) and redness indicate a possible allergic reaction.
3. Oral Food Challenge (OFC):
o Under medical supervision, the patient is given small, increasing amounts of peanut to observe for a reaction.
o Considered the most accurate test but is riskier, so only done in a clinical setting.

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    Description

    Why It’s Done:

    This test is performed to:
    • Confirm or rule out a peanut allergy
    • Investigate the cause of allergic symptoms such as:
    o Hives, swelling, itching
    o Shortness of breath
    o Vomiting or diarrhea
    o Anaphylaxis (a severe, life-threatening allergic reaction)
    • Determine the severity of the allergy
    • Monitor whether a child may be outgrowing a peanut allergy
    • Guide decisions about diet and emergency treatment plans (e.g., epinephrine auto-injectors)

    Preparation:

    For a Blood Test:
    • No fasting or special preparation is typically required.
    • Inform your doctor about:
    o Any allergy medications or antihistamines, though they usually do not affect IgE levels.
    For a Skin Prick Test:
    • Avoid antihistamines for 5–7 days before the test (as advised by your doctor), as they can affect results.
    • Wear clothing that allows easy access to the test area (e.g., short sleeves).
    • Inform the doctor about:
    o Asthma, eczema, or current medications
    For an Oral Food Challenge:
    • Conducted only under medical supervision.
    • Do not eat or drink for a few hours prior to the test, depending on clinical instructions.
    • Must bring any emergency medications and be monitored for several hours after testing

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