Home / Blood Tests / Immunoglobulin A (IgA)

Immunoglobulin A (IgA)

What Is Immunoglobulin A (IgA)?
Immunoglobulin A (IgA) is a vital antibody that forms a key part of the body’s immune defence, particularly at mucosal surfaces. It is predominantly found in areas exposed to the external environment, such as the respiratory and digestive tracts, as well as in bodily fluids like saliva, tears, and breast milk.

Role of IgA in Immune Protection
IgA antibodies help protect against infections by binding to harmful bacteria and viruses, neutralising them before they can cause illness. They also prevent pathogens from attaching to and penetrating the mucous membranes, reducing the risk of infection at entry points.

Where IgA Is Found in the Body
As the most abundant antibody in mucosal areas, IgA is present in the lining of the respiratory tract, gastrointestinal tract, and urogenital tract. It also circulates in lower concentrations in the bloodstream.

Understanding IgA Deficiency
IgA deficiency is a condition in which the body produces little or no IgA antibodies. This can result in a higher risk of recurrent respiratory and gastrointestinal infections. However, many individuals with IgA deficiency may be asymptomatic and unaware of the condition.

Private IgA Antibody Testing in Slough
Residents in Slough, Windsor, Maidenhead, and nearby Berkshire areas can access private IgA blood testing to evaluate immune function and identify potential deficiencies. Early detection supports personalised treatment plans and helps reduce the risk of recurrent infections.