![]() ![]() A lab tech will usually take a sample of your blood by inserting a needle into a vein in your arm. HIV/ AIDS or multiple myeloma (a type of cancer), or another condition that needs to be monitoredĭoctors often measure IgA, IgG, and IgM together to get a snapshot of your immune function.Fevers that can't be explained by another cause.They may also order the test if you have: Your doctor might order an immunoglobulin test if you get a lot of infections - especially infections of the sinuses, lungs, stomach, or intestines. Your doctor will likely measure your IgE levels if you have a blood test to check for allergies. Immunoglobulin E: Your body makes IgE antibodies when it overreacts to substances that aren't harmful, such as pollen or pet dander. It will then begin to drop as your IgG level kicks in and increases to protect you long-term. When your body senses an invader, your IgM level will rise for a short time. They are your body's first line of defense against infections. ![]() Immunoglobulin M: Your body makes IgM antibodies when you are first infected with new bacteria or other germs. Your doctor can test for IgG to figure out whether you've been infected by certain kinds of bacteria or virus. If those germs come back, your immune system knows to attack them. These antibodies protect you against infection by "remembering" which germs you've been exposed to before. Immunoglobulin G: IgG is the most common type of antibody in your blood and other body fluids. They're also in fluids these membranes produce, like saliva and tears, as well as in the blood. ![]() Immunoglobulin A: IgA antibodies are found in the mucous membranes of the lungs, sinuses, stomach, and intestines. Your body makes a few different types of immunoglobulin antibodies, including these: Having too many could mean you have allergies or an overactive immune system. Having too few immunoglobulins in your blood gives you a greater chance of getting infections. Some conditions cause your body to make too many or too few immunoglobulins. The immunoglobulin test can show whether there's a problem with your immune system. This test checks the amount of certain antibodies called immunoglobulins in your body.Īntibodies are proteins that your immune cells make to fight off bacteria, viruses, and other harmful invaders. ![]()
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