Test guide
Immunoglobulins Blood Test
An immunoglobulins blood test measures the amount of immunoglobulins in your blood. Immunoglobulins are also called antibodies. Antibodies are proteins that your immune system makes to fight germs , such as viruses and bacteria . Your body makes different kinds of antibodies to fight germs in different parts of the body and at different stages of an infection.
What it is for
An immunoglobulins blood test can help your health care provider diagnose different types of health conditions that may affect your immune system. A variety of conditions can cause abnormal levels of IgM, IgG, and/or IgA, such as: Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also known as
- quantitative immunoglobulins, total immunoglobulins, IgG, IgM, IgA testing
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