LABORATORY TESTS FOR ASSESSMENT OF PHAGOCYTIC
Phagocytic cell function tests are usually performed with isolated peripheral blood neutrophils. Killing defects are the most frequent primary abnormalities of these cells and can be tested in a variety of ways. Bacterial killing tests are not routinely available in diagnos-tic laboratories. Instead, tests based on the induction and measurement of the respiratory burst (such as the NBT reduction test) are used to investigate those defects.