Screening Test for the Diagnosis of Chronic Granulomatous Disease

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Abstract
Normal phagocytes suspended in plasma when mixed with latex particles for ingestion and nitroblue tetrazolium dye will reduce the dye to a blue color which may be easily seen in a test tube. This reaction depends on the release of enzymes from phagocytic lysosomal granules after phagocytosis. Since such release is deficient in patients with CGD, no blue color develops in the tube. This has proved to be a simple, reliable, screening test which should allow the more rapid and widespread diagnosis of CGD.
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