![]() A yeast infection in the mouth, eyes, or digestive tract (thrush).Cytomegalovirus (a virus related to chickenpox).Serious infections from germs that don't usually cause problems in healthy people, such as:.Respiratory infections, such as pneumonia and bronchitis.Symptoms of low levels of immunoglobulins usually include having many, repeated infections and other problems, such as: If you have too few immunoglobulins, you have an immunodeficiency. You may need this test if you have symptoms that could mean your immunoglobulin levels are too low. ![]() Why do I need an immunoglobulins blood test? Other names: quantitative immunoglobulins, total immunoglobulins, IgG, IgM, IgA testing You have IgA antibodies in your blood, saliva, and gastric "juices."Īn immunoglobulins blood test measures the amounts of IgM, IgG, and IgA in your blood to help diagnose different types of health conditions that may affect your immune system. IgA antibodies protect your respiratory tract (the organs you use to breathe) and your digestive system (the organs you use to eat and digest food) from infections.That way, if you're exposed to the same germs again, your immune system can quickly make more antibodies. Your body keeps a "blueprint" of all the IgG antibodies you have made. ![]() You also have some IgG antibodies in all your body fluids. Most of the immunoglobulins in your blood are IgG.
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