Description
Why It’s Done:
The Total IgE test is performed to:
• Assess for allergies: Elevated total IgE levels are commonly seen in people with allergic conditions like asthma, hay fever, eczema, and food allergies.
• Evaluate atopic conditions: High IgE levels are often seen in atopic individuals, those with a genetic predisposition to developing allergic diseases.
• Diagnose or monitor allergic reactions: If you have unexplained symptoms of an allergic reaction, such as sneezing, itching, or skin rashes, this test may be used to help identify the presence of an allergic condition.
• Investigate parasitic infections: Elevated IgE levels may also indicate the presence of certain parasitic infections, such as roundworms or tapeworms.
• Monitor treatment: In patients with known allergic conditions or asthma, measuring IgE levels can help monitor disease progression or response to treatment.
While the Total IgE test provides an overall assessment, it may be followed by specific IgE tests to identify particular allergens (such as food, pollen, or dust mites).
Preparation:
• No special preparation is usually required for the Total IgE test.
• The test is done using a blood sample drawn from a vein in your arm.
• It is advisable to inform your healthcare provider about any medications you are taking, as certain drugs (such as antihistamines) may affect the results of the test.
• Timing of the test is generally not critical, but it is important to avoid taking medications that could mask allergy symptoms (e.g., antihistamines or steroids) close to the time of the test.
