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In this video, youâll learn how to test for TB infection by. administering and reading the Mantoux tuberculin skin test. The Mantoux tuberculin skin test should always be placed. and read by a designated, trained health care worker . Discuss skin test training, certification. programs, and requirements in your locality . In your work site: yWhat type of health care worker is. designated to place and read the skin.
The TB antigens used in a tuberculin skin test are called purified protein derivative (PPD). A measured amount of PPD in a shot is put under the top layer of skin on your forearm. This is a good test for finding a TB infection. It is often used when symptoms, screening, or testing, such as a chest X-ray, show that a person may have TB. A tuberculin skin test cannot tell how long you have been infected with TB. It also cannot tell if the infection is latent (inactive) or is active and can be passed to others. Why It Is Done. A tuberculin skin test is done to find people who have tuberculosis (TB), including: People who have been in close contact with someone known to have TB.