The list of medical tests mentioned in various sources as used in the diagnosis of Selective IgA Deficiency includes:
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Serum immunoelectrophoresis and quantitative immunologic analyses of patients with IgA-deficiency show serum IgA levels below 7 mg/dl. Although IgA is usually absent from secretions in patients with IgA-deficiency, levels may be normal in rare cases. IgE is normal, whereas IgM may be normal or elevated in serum and secretions. Normally absent low-molecular-weight IgM may be present.
Tests may also indicate autoantibodies and antibodies against IgG (rheumatoid factor), IgM, and bovine milk. Cell-mediated immunity and secretory piece (the glycopeptide that transports IgA) are usually normal, and most circulating B cells appear normal.
Source: Professional Guide to Diseases (Eighth Edition), 2005
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