Final answer:
Nitrotetrazolium blue is a dye used to detect diseases, and the new test uses DHR-123 to detect the same diseases.
Step-by-step explanation:
Nitrotetrazolium blue is a dye used in medical tests for detecting certain diseases. In the test, if the dye turns yellow, it indicates the presence of the disease. A new test called Flow cytometry with DHR-123 is used to detect the disease as well. This test uses a fluorescent dye called DHR-123 and measures the presence of reactive oxygen species in the cells, which can indicate the disease.