Allergen-specific immunoglobulin E (IgE)
Also Known As: A1C Test Glycated Hemoglobin Test HbA1C Hgba1c Hgb a1c
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About the Test
Description:
Allergen-specific immunoglobulin E (IgE) is a type of protein called an antibody that is produced by the immune system in response to exposure to a specific allergen. Allergens are substances that can cause an allergic reaction in some people, such as pollen, dust, or certain foods.
IgE plays a key role in allergic reactions, such as hay fever and asthma. When a person is exposed to an allergen, their body produces IgE antibodies that bind to the allergen and trigger the release of chemicals, such as histamine, that cause allergic symptoms.
Clinical Significance:
In addition to allergies, high levels of IgE may also be associated with certain medical conditions, such as eczema and certain types of cancer. However, it's important to note that a single test result for IgE levels may not provide enough information to diagnose a medical condition. It's important to consider other factors such as a person's medical history and any other symptoms they may be experiencing.
Prep Checklist
| Activity | Required for the test |
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| Avoiding Alcohol Consumption |
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| Fasting (24hrs) |
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| Avoiding Smoking |
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| Avoiding Strenuous Exercise or Sexual Activity |
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| Avoiding Medicines and/or Supplements |
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More about Tests
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16 September, 2022
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Target Levels (where applicable)
IgE levels can be measured through a blood test called an allergy panel. This test is often ordered by a healthcare provider to help diagnose allergies or to monitor the effectiveness of treatment for allergies.
Normal levels of IgE vary widely depending on a person's age, sex, and overall health, but generally range from 0 to 700 international units per milliliter (IU/mL). High levels of IgE may be a sign of an allergic condition, such as hay fever or asthma. However, it's important to note that a single test result for IgE levels may not provide enough information to diagnose a medical condition. It's important to consider other factors such as a person's medical history and any other symptoms they may be experiencing.
What is being checked
Serum IgE test: This is the most common type of test used to measure IgE levels. It involves taking a sample of blood from a vein, usually in the arm, and sending it to a laboratory for analysis.
Skin prick test: This test involves applying a small amount of an allergen to the skin and observing the reaction. It may be used to help diagnose allergies.
Patch test: This test involves applying a patch containing an allergen to the skin and observing the reaction. It may be used to help diagnose allergies or to determine the cause of skin irritation.
It's important to note that a single test result for IgE levels may not provide enough information to diagnose a medical condition. It's important to consider other factors such as a person's medical history and any other symptoms they may be experiencing. If you have concerns about your IgE levels or are experiencing any unusual symptoms, it's important to discuss them with your healthcare provider. They can help determine the cause of your symptoms and recommend appropriate treatment.