MedlinePlus Medical Encyclopedia: Nitroblue tetrazolium test

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Nitroblue tetrazolium test

Nitroblue tetrazolium test is a blood test that measures the ability of the immune system to convert the colorless nitroblue tetrazolium (NBT) to a deep blue. This test is performed as a screen for chronic granulomatous disease (CGD). If an individual has CGD, the chemicals in their blood will not turn blue when exposed to the NBT.

Update Date: 5/25/2007

Updated by: Daniel R Alexander, MD, Department of Internal Medicine, St. Mary's Hospital, Leonardtown, MD. Review provided by VeriMed Healthcare Network.

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