IgA deficiency
Most people with selective IgA deficiency have no symptoms.
Some people with this condition have chronic diarrhea caused by intestinal infections. Some have frequent ear, sinus, and lung infections.
Other symptoms include mouth infections and unexplained asthma or bronchiectasis (a disease in which the small air sacs in the lungs become damaged and enlarge).
There may be a family history of IgA deficiency. Tests that may be done include:
Azar AE. Evaluation of the adult with suspected immunodeficiency. Am J Med. 2007; 120(9):764-8.
Hoffman R, Benz EJ, Shattil SS, et al. Hematology: Basic Principles and Practice. 4th ed. Orlando, Fl: Churchill Livingstone; 2005.
Mandell GL, Bennett JE, Dolin R. Principles and Practice of Infectious Diseases. 6th ed. London: Churchill Livingstone; 2005.
Morimoto Y. Immunodeficiency Overview. Prim Care. 2008; 35(1):159-7, viii.