Normal, healthy individuals who do not have anti-IgA antibodies contain <99 U/mL. The reportable range is 16-1000 U/mL
For the evaluation of patient with recurrent infection for the possibility of IgA deficiency (IgAD). Patient with IgA deficiency may develop antibodies against IgA that make them suseptible to blood products including intravenous immunoglobulin.