Adenosine Deaminase (ADA) analysis is a laboratory test used to measure the level of the enzyme adenosine deaminase in blood serum or body fluids. This enzyme is essential for adenosine metabolism and plays an important role in regulating the immune response. The results of this test are primarily used to diagnose a range of medical conditions, including meningitis, viral infections, and immune system disorders. Normal adenosine deaminase levels typically range from 10 to 40 international units per liter, and elevated levels may indicate the presence of inflammation or infection. This test is a valuable tool for healthcare professionals, helping guide treatment decisions and enhancing understanding of a patient’s health status.