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IgA Antibodies: Guardians of Mucous Membrane Immunity

What are IgA Antibodies?

IgA antibodies, also known as immunoglobulin A, are specialized proteins produced by white blood cells. They play a crucial role in protecting the surfaces of mucous membranes, which line many organs and cavities in the body, including the lungs, sinuses, stomach, and intestines.

Role in Mucous Membrane Immunity

Mucous membranes act as barriers against invading microorganisms. IgA antibodies are concentrated in the fluids that bathe these membranes, forming a protective layer that neutralizes pathogens and prevents them from establishing infections. They work in conjunction with other immune factors to create a strong defense mechanism.

Measurement of IgA Levels

An immunoglobulins blood test can measure the levels of three specific types of immunoglobulins: IgG, IgM, and IgA. This test helps diagnose various health conditions that affect the immune system. Abnormal levels of IgA, either too low or too high, can indicate underlying immune disorders or infections.