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Section 3.8
Immunology Problem Solving
An 18-month-old boy has recurrent sinopulmonary infections and septicemia. Bruton’s X-linked immunodeficiency syndrome is suspected. Which test result would be markedly decreased?
Serum IgG, IgA, and IgM
Total T-cell count
Both B- and T-cell counts
Lymphocyte proliferation with phytohemagglutinin stimulation
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