What is a test for tuberculosis?

Tuberculin Skin Test: A tst called a PPD is the first step in screening for tb. It is performed by placing a tiny needle just under the skin (usually on the underside of the forearm). A small bubble is created and left alone for 48-72 hrs before being interpreted.

TB skin testing: Although the traditional skin test (tuberculin or ppd) is most commonly used, reading the reaction can be subjective and confusing. A new blood test called quantiferon is much more reliable when that situation arises..

TB: A tuberculin skin test.