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 & ServicesBook: 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 at Mayo Clinic Diagnosis & treatment March 05, 2022 Print Share on: FacebookTwitter 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 High Platelets 6 Replies Tue, Nov 15, 2022 chevron-right MGUS monitoring: What tests do you have done regularly? 11 Replies Mon, Nov 07, 2022 chevron-right Erythrocytosis: Any suggestions for low ferritin due to phlebotomies? 11 Replies Fri, Oct 14, 2022 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 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 at Mayo Clinic 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 IncontinenceNEW – The Essential Diabetes Book - Mayo Clinic PressNEW – The Essential Diabetes BookNEW – Mayo Clinic on Hearing and Balance - Mayo Clinic PressNEW – Mayo 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