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IgA Deficiency (IgAD): definition

An inherited immune deficiency disorder characterized by the marked absence of IgA (immunoglobulin A) type antibodies in blood in the presence of normal blood levels of IgG (immunoglobulin G) and IgM (immunoglobulin M) type antibodies.… 

IgA Nephropathy: definition

A primary renal disease in which circulating IgA antigliadin antibodies (IgA-AGA) are often found and is characterized by recurrent hematuria (blood in urine), mild proteinuria (protein in urine), and changes to the kidney’s filtering apparatus…