Print OverviewSelective IgA deficiency is an immune system condition in which you lack or don't have enough immunoglobulin A (IgA), a protein that fights infection (antibody). Most people with selective IgA deficiency don't have recurrent infections. However, some people who have IgA deficiency experience pneumonia, ear infections, sinus infections, allergies, asthma and diarrhea. Autoimmune diseases, in which your immune system attacks particular organs or tissues in your own body, can be found with selective IgA deficiency. Common autoimmune conditions found with IgA deficiency include rheumatoid arthritis, lupus, celiac disease or inflammatory bowel disease.Products & ServicesA Book: Mayo Clinic Family Health Book, 5th EditionNewsletter: Mayo Clinic Health Letter — Digital EditionShow more products from Mayo Clinic By Mayo Clinic Staff Selective IgA deficiency care at Mayo Clinic Request an appointment Diagnosis & treatment March 05, 2022 Print Living with selective iga deficiency? Connect with others like you for support and answers to your questions in the Blood Cancers & Disorders support group on Mayo Clinic Connect, a patient community. Blood Cancers & Disorders Discussions Does anyone else have MGUS? 557 Replies Sun, Dec 03, 2023 chevron-right Newly Diagnosed with Smoldering Multiple Myeloma: Watch & wait 35 Replies Sat, Dec 02, 2023 chevron-right Polycythemia Vera and Nutritional Ketosis 40 Replies Sat, Dec 02, 2023 chevron-right See more discussions Show references Selective IgA deficiency. Merck Manual Professional Version. https://www.merckmanuals.com/professional/immunology-allergic-disorders/immunodeficiency-disorders/selective-iga-deficiency. Accessed Feb. 14, 2020. Selective IgA deficiency. Immune Deficiency Foundation. https://primaryimmune.org/about-primary-immunodeficiencies/specific-disease-types/selective-iga-deficiency. Accessed Feb. 14, 2020. Brown AY. Allscripts EPSi. Mayo Clinic. Nov. 14, 2019. Related Products & Services A Book: Mayo Clinic Family Health Book, 5th Edition Newsletter: Mayo Clinic Health Letter — Digital Edition Show more products and services from Mayo Clinic Selective IgA deficiencySymptoms&causesDiagnosis&treatmentDoctors&departmentsCare atMayoClinic Advertisement Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. Advertising & Sponsorship Policy Opportunities Ad Choices Mayo Clinic Press Check out these best-sellers and special offers on books and newsletters from Mayo Clinic Press. Mayo Clinic on Incontinence - Mayo Clinic PressMayo Clinic on IncontinenceThe Essential Diabetes Book - Mayo Clinic PressThe Essential Diabetes BookMayo Clinic on Hearing and Balance - Mayo Clinic PressMayo Clinic on Hearing and BalanceFREE Mayo Clinic Diet Assessment - Mayo Clinic PressFREE Mayo Clinic Diet AssessmentMayo Clinic Health Letter - FREE book - Mayo Clinic PressMayo Clinic Health Letter - FREE book CON-20256724 Patient Care & Health Information Diseases & Conditions Selective IgA deficiency