IgA

Immunoglobulins are an important part of the body’s immune response. The immunoglobulin A (IgA) molecule is composed of two light chains (kappa and lambda), two alpha heavy chains, and a secretory component. The level of IgA in serum increases in hepatic disease and bacterial or viral infections. The level of IgA decreases in diseases with congenital immunodeficiency. The measurement of IgA provides useful information in the assessment of these diseases or conditions.