In high-income western countries, interferon-γ release assays (IGRAs) have largely replaced the classic tuberculin skin test for diagnosing latent tuberculosis ... with low-positive IGRA results ...

The vaccine can cause a false positive TB skin test reaction. TB blood tests are the preferred tests for people who have received the BCG TB vaccine. Unlike the TB skin test, TB blood tests are ...

The test is sometimes called a tuberculin skin test (TST ... if you have received the TB vaccine, the PPD can sometimes return a false-positive result. The information on this website may ...

Medicare may cover the costs of a purified protein derivative (PPD) test if a person has symptoms or has been exposed to tuberculosis (TB). If not, Medicare will likely deny coverage as it would ...

The skin TB test involves injecting a small amount of tuberculin (PPD) under the skin on the forearm and checking for a reaction (swelling) after 48-72 hours. A positive result indicates a ...