A

What are the functions of immunoglobulin A? Immunoglobulin A is primarily responsible for the defense against pathogens on the surface of mucous membranes. After its formation, it is therefore mainly released into secretions (hence also called “secretory IgA”). These are, for example, the secretions of the gastrointestinal tract, vagina, nose and bronchi, as well as … Immunoglobulin A (IgA): What the lab value means