Description

Immunoglobulin A (IgA) is one of the main types of antibodies found in the mucous membranes, particularly those lining the respiratory and gastrointestinal tracts. IgA plays a crucial role in the immune defense against infections at these mucosal surfaces.

A serum IgA test measures the level of IgA antibodies present in the bloodstream. This test is commonly used to evaluate the immune system’s ability to produce IgA antibodies. Abnormal levels of serum IgA can indicate various immune system disorders, such as IgA deficiency, autoimmune diseases, or certain infections. Additionally, measuring serum IgA levels can aid in the diagnosis and monitoring of conditions affecting the immune system.