Immunoglobulin E (IgE)
The purpose of this test is to:
- Measure IgE levels in the blood
- Diagnose allergic conditions
- Assess severity of allergic reactions
- Support evaluation of immune-related disorders
IMMUNOGLOBULIN E (IGE) Test
The Immunoglobulin E (IgE) test measures the level of IgE antibodies in the blood. IgE is a type of antibody involved primarily in the body's immune response to allergens.
When a person with an allergy is exposed to a triggering substance, the immune system may produce IgE antibodies that contribute to symptoms such as sneezing, itching, skin rashes, wheezing, or other allergic reactions. Total IgE testing can provide supportive information when evaluating suspected allergic or certain immune-related conditions.
However, an elevated total IgE level does not identify a specific allergy and does not necessarily mean that a person has an allergy. Total IgE can also be increased in some parasitic infections and other medical conditions. When identifying specific allergens is necessary, doctors may recommend allergen-specific IgE testing.
IMMUNOGLOBULIN E (IGE) Test is Recommended for Individuals:
- Individuals with suspected allergic conditions
- People experiencing recurrent itching, rashes, sneezing, or wheezing
- Individuals with suspected allergic rhinitis
- People being evaluated for allergic asthma
- Individuals with recurrent or unexplained skin allergies
- Individuals with suspected parasitic infection, when clinically indicated
- Patients undergoing evaluation of unexplained elevated IgE levels
FAQs
1. What does the IgE test measure?
The test measures the level of Immunoglobulin E (IgE) in the blood. IgE is associated with allergic immune responses and certain other immune conditions.
2. Does a high IgE level mean I have an allergy?
Not necessarily. A high total IgE level can occur with allergies, parasitic infections, and certain other conditions. It does not identify which specific substance is causing an allergy.
3. What is the difference between total IgE and specific IgE?
Total IgE measures the overall amount of IgE in the blood, while specific IgE tests measure IgE antibodies against particular allergens, such as dust mites, pollen, foods, or animal dander. Specific IgE testing may be recommended when identifying individual triggers is necessary.