Normal Range = IgA: 78-367 mg/dL. IgG: 583-1761 mg/dL.
IgM: 52-335 mg/dL.
IgG increased in- Polyclonal: Autoimmune
diseases (eg, SLE, RA), sarcoidosis, chronic or recurrent infections.
IgA increased in- Polyclonal: Chronic liver disease,
chronic infections (especially of the GI and respiratory tracts).
IgG decreased in- Immunosuppressive therapy.
IgM decreased in- Immunosuppresive therapy.