Demonstration of MPO activity in CGD granulocytes in whole blood with the Bayer/Technicon H3 (leukogram).

(A) Whole blood of a healthy person (x-axis, peroxidase activity; y-axis, forward scattering). (B) Whole blood of a person with MPO deficiency. (C) Whole blood of a person with CGD. The MPXI is marked below; N indicates neutrophils; E, eosinophils; M, monocytes; L, lymphocytes; LUC, large unstained cells.