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  • IgE (Immunoglobulin E)

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    What is an IgE test?

    An immunoglobulin E (IgE) test measures the blood level of IgE, one of the five subclasses of antibodies. Antibodies are proteins made by the immune system that attack antigens, such as bacteria, viruses, and allergens.

    IgE antibodies are found in the lungs, skin, and mucous membranes. They are associated mainly with allergic reactions (when the immune system overreacts to environmental antigens such as pollen or pet dander) and parasitic infections.

    IgE (Immunoglobulin E) Test

    Cost Rs. 600/-

    Why do an IgE test?

    • As part of an initial screen for allergies
    • Elevated in children with parasitic infections
    • When a person has periodic or persistent symptoms that may be due to an allergic reaction, especially when the potential allergen is unknown

    In some cases, the results of the IgE test will provide a diagnosis and your doctor may prescribe treatment. More often further testing (such as a skin test or allergen-specific IgE blood test) may be necessary to determine what particular allergen is causing the allergy.

    When to get tested for IgE?

    • When you have periodic or persistent skin, lung, or digestive symptoms that suggest allergies
    • When a doctor suspects a parasitic infection
    • In addition, a CBC with white blood cell differential may be ordered to determine if the number of eosinophils is increased

    How is the IgE test result used?

    The total IgE test may be used to screen for and detect allergic diseases. It may be ordered by itself, before, or along with allergen-specific IgE tests - depending upon whether or not potential substances to which the person may be allergic are identified.

    What does the test result mean?

    An increased total IgE level indicates that it is likely that a person has one or more allergies. Allergen-specific IgE levels will increase after an exposure and then decline over time, thus affecting the total IgE level.

    If a person is allergic to a seasonal substance, such as pollen, then both the specific IgE and total IgE would be expected to increase during the time of year when the allergen is present.

    If someone has one or more food allergies, then the total IgE level would mirror exposures to these foods.

    If someone is allergic to something that they are constantly around, such as mold in a house or cat dander, then the total IgE level may be persistently increased.

    An elevated level of total IgE indicates an allergic process is likely present, but it will not indicate what a person is allergic to.

    In general, the greater the number of things a person is allergic to, the higher the total IgE level may be. An IgE elevation can also indicate the presence of a parasitic infection but cannot be used to determine the type of infection.

    A normal IgE level makes it less likely that a person has allergies but does not rule them out due to the length of time between exposures. In between exposures, a person's IgE level may drop.

    Sometimes an individual has a condition that affects their immune system and will not produce normal amounts of immunoglobulins. In this case, a person could have an allergy that is not reflected by the total IgE test result.

    A person's symptoms during an allergic episode do not necessarily correlate with their total IgE level.

    For more information, please contact us at +91 22 66949876 / 9833141024 or email us at disha@pathologylabindia.com for any test requirement or any query related to our pathology lab

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