Alternative titles and symbols : Cgd, autosomal recessive cytochrome b-negative; Cyba deficiency; Cgd due to deficiency of the alpha subunit of cytochrome b; Granulomatous disease, chronic, autosomal recessive, cytochrome b-negative;
Description : Chronic granulomatous disease is a genetically heterogeneous immunodeficiency disorder
resulting from an inability of phagocytes to kill microbes that they have ingested.
This impairment in killing is caused by any of several defects in the NADPH oxidase
enzyme complex which generates the microbicidal 'respiratory burst.';
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the cytochrome b(-245) alpha subunit gene (CYBA, 608508.0001);
Laboratory abnormalities : Deficiency or absence of cytochrome b(-245); Deficiency or absence of p91-phox (300481) protein; Deficiency or absence of p22-phox protein; Negative nitroblue tetrazolium (NBT) reduction test; Decreased activity of NADPH oxidase;