TOPICS: Respiratory (oxidative) burst, X-linked, neutrophils, reactive oxygen species (ROS), NADPH oxidase, failed oxidative burst, catalase positive organisms, Burkholderia cepacia, Serratia marcescens, Nocardia, Staphylococcal aureus, Aspergillus, fungi infections, nitroblue tetrazolium (NBT) dye test, dihydrorhodamine (DHR) test, green fluorescence in DHR test, flow cytometry