Selective Deficiency of IgA Overview
Learn About Selective Deficiency of IgA
Selective deficiency of IgA is the most common immune deficiency disorder. People with this disorder have a low or absent level of a blood protein called immunoglobulin A.
IgA deficiency; Immunodepressed - IgA deficiency; Immunosuppressed - IgA deficiency; Hypogammaglobulinemia - IgA deficiency; Agammaglobulinemia - IgA deficiency
Selective IgA deficiency is usually inherited, which means it is passed down through families. However, there are also cases of drug-induced selective IgA deficiency.
It may be inherited as an autosomal dominant or autosomal recessive trait. It is usually found in people of European origin. It is less common in people of other ethnicities.
Many people with selective IgA deficiency have no symptoms.
If a person does have symptoms, they may include frequent episodes of:
- Bronchitis (airway infection)
- Chronic diarrhea
- Conjunctivitis (eye infection)
- Gastrointestinal inflammation, including ulcerative colitis, Crohn disease, and a sprue-like illness
- Mouth infection
- Otitis media (middle ear infection)
- Pneumonia (lung infection)
- Sinusitis (sinus infection)
- Skin infections
- Upper respiratory tract infections
Other symptoms include:
- Bronchiectasis (a disease in which the bronchial tubes in the lungs become damaged and enlarged)
- Asthma without a known cause
No specific treatment is available. Some people gradually develop normal levels of IgA without treatment.
Treatment involves taking steps to reduce the number and severity of infections. Antibiotics are often needed to treat bacterial infections.
For people with more frequent or severe infections, immunoglobulins might be given through a vein or by injection to boost the immune system.
Autoimmune disease treatment is based on the specific problem.
Note: People with complete IgA deficiency may develop anti-IgA antibodies if given blood products and immunoglobulins. This may lead to allergies or life-threatening anaphylactic shock. However, they can safely be given IgA-depleted immunoglobulins.
University Of Cincinnati Physicians Company LLC
Yashu Dhamija is an Allergy and Immunologist in Cincinnati, Ohio. Dr. Dhamija has been practicing medicine for over 8 years and is rated as an Experienced provider by MediFind in the treatment of Selective Deficiency of IgA. His top areas of expertise are Selective Deficiency of IgA, Allergic Rhinitis, and Anaphylaxis. Dr. Dhamija is currently accepting new patients.
Elyse Lower is an Oncologist and a Hematologist Oncology provider in Cincinnati, Ohio. Dr. Lower and is rated as an Experienced provider by MediFind in the treatment of Selective Deficiency of IgA. Her top areas of expertise are Breast Cancer, Inflammatory Breast Cancer, Angiosarcoma, and Paget Disease of the Breast. Dr. Lower is currently accepting new patients.
Kentucky Medical Services Foundation, Inc
John Thompson is an Allergy and Immunologist in Lexington, Kentucky. Dr. Thompson and is rated as an Advanced provider by MediFind in the treatment of Selective Deficiency of IgA. His top areas of expertise are Primary Immunodeficiency (PID), Common Variable Immune Deficiency, Selective Deficiency of IgA, and Omenn Syndrome.
Selective IgA deficiency tends to be less severe than many other immunodeficiency diseases.
Many people with selective IgA deficiency have no symptoms at all. Some people with IgA deficiency will recover on their own and produce IgA in larger quantities over a period of years.
Autoimmune disorders such as rheumatoid arthritis, systemic lupus erythematosus, and celiac disease may develop.
People with IgA deficiency may develop antibodies to IgA. As a result, they can have severe, even life-threatening reactions to transfusions of blood and blood products.
People with IgA deficiency should contact their health care provider if they are having symptoms of an infection or intestinal symptoms.
Genetic counseling may be of value to prospective parents with a family history of selective IgA deficiency.
Published Date: March 31, 2024
Published By: Deborah Pedersen, MD, MS, Allergy & Asthma Care, PC, Taunton, MA. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
Cunningham-Rundles C. Primary immunodeficiency diseases. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 231.
Hernandez-Trujillo VP, Ortega C. B-cell and antibody deficiencies. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. Nelson Textbook of Pediatrics. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 166.