IgA

Also known as:  Alpha Globulin;  Immunoglobulin A;  Secretory IgA;  sIgA

IgA is a type of Antibody (Immunoglobulin) that circulates in the Gastric Fluids, Blood Plasma, Saliva and Mucous Membranes of the body - it comprises 20% of the total Antibody content of Blood Plasma.

Ears/Hearing

 Insufficient IgA production may be an underlying cause of recurring Otitis Media.  ^[1]

Immune System

 IgA may inhibit the HIV virus that causes Acquired Immune Deficiency Syndrome (AIDS).  ^[2]

 IgA is a major line of defense against local Bacterial & Viral Diseases in the Respiratory System and the Gastrointestinal Tract.  ^[3]

 IgA is one of the most important first lines of defense of the Immune System (humoral immunity) in the Mouth, Digestive System, Lungs, Urinary Tract and other body cavities.

Respiratory System

 Insufficient IgA production may be an underlying cause of Hay Fever.  ^[4]

 Insufficient IgA production may be an underlying cause of recurring Pneumonia.  ^[5]

 Insufficient IgA production may be an underlying cause of recurring Sinusitis.  ^[6]

Skin

 IgA is speculated to play a role in the prevention of Psoriasis (this is based on a case of Psoriasis in which the patient exhibited absolute IgA deficiency).  ^[7]