Tb testTb test2/25/2011 · Chembio Diagnostics, Inc. . The interpretation of the tuberculin skin test depends upon the person's risk factors for infection and progression to TB disease, such as exposure to other cases of TB . PPD stands for purified protein derivative. TB, for accurately detecting active and latent TB infectionScientists have developed an automated test that can rapidly and accurately detect tuberculosis and drug-resistant TB bacteria in patients. The PPD skin test is a m... more