Description
The Immune Globulin Blood Test measures the levels of three major types of antibodies—IgA, IgG, and IgM—in your blood. These antibodies are proteins produced by your immune system to help fight infections. This test provides important information about your immune system function.
What the Test Measures
- IgA (Immunoglobulin A): Found in mucous membranes, saliva, and tears. It helps protect your respiratory and digestive tracts from infections.
- IgG (Immunoglobulin G): The most abundant antibody in the blood. It provides long-term protection after infection or vaccination.
- IgM (Immunoglobulin M): The first antibody your body produces in response to an infection, providing early immune defense.
Why It’s Done
- To evaluate immune system function and identify deficiencies.
- To investigate frequent or unusual infections, including respiratory or gastrointestinal infections.
- To monitor immune disorders such as immunodeficiency diseases or autoimmune conditions.
- To assess response to vaccines or previous infections.
Symptoms and Conditions That May Lead to Testing
- Frequent infections or prolonged illness
- Chronic diarrhea or digestive issues
- Unexplained fatigue or weakness
- Autoimmune disorders
Test Details
- Specimen: Blood sample
- Fasting: Not required
- Results Interpretation:
- Low levels of IgA, IgG, or IgM may indicate immune deficiency.
- High levels may suggest chronic infection, inflammation, or certain immune disorders.
