Adenosine Deaminase Test or ADA test is usually recommended by the doctor to either

identify or rule out the disease Mycobacterium tuberculosis in patients. The test detects

tuberculosis in one's pleural fluid and thereby helps in its diagnosis. The main symptoms of

ADA deficiency are pneumonia, chronic diarrhea, and widespread skin rashes. Affected

children also grow much more slowly than healthy children and some have developmental

delay. Most individuals with ADA deficiency are diagnosed with SCID in the first 6 months

of life.