IMMUNOGLOBULIN A, QUANTITATIVE (IgA)
Collect SST or plain red top/send 1.0 mL serum.
Room temp: 14 days, Refrigerated: 14 days, Frozen: 14 days
Evaluate humoral immunity; monitor therapy in IgA myeloma. Selective IgA deficiency has an increased association with allergies, recurrent sinopulmonary infection, autoimmune disease, and the HLA A28, B14 or A1, B14 types. IgA deficiency accompanied by a deficiency of subclass IgG2 is associated with recurrent sinopulmonary infections.