[Quantitative evaluation of the nitroblue tetrazolium reduction test]

The results of NBT test were assessed by the visual cytochemical method and by the quantitative spectrophotometry technique developed by the authors for the NBT test. The results demonstrate a higher sensitivity and informative value of the new method, in case the neutrophilic tetrazolium activity is rather high; this recommends the NBT test spectrophotometric variant for wide clinical application in studies of the blood leukocyte functional and metabolic activity.