Immunoglobulin D is one of the immunoglobulins in the body [others are IgA, IgG, IgM, IgE]. Of all these antibodies whose function is always to protect the body against various kinds of infection, IgD is found in the smallest amounts.It occurs in the outer membrane of B cells which go on to produce lymphocytes which are an important part of the white blood cells in the body. All of the tests you mention here are done to find out if the white blood cells are functioning normally.In particular the tests are done to exclude a serious immune disease called chronic granulomatous disease [ CGD].I need the reference values to answer your question properly but the neutrophil burst tests seems to be normal.
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