Tuberculin Skin TestsMantoux Test, TB Skin Test How It Is DoneFor a tuberculin skin test, you sit down and turn the inner side of
your forearm up. The skin where the test is done is cleaned and allowed to dry.
A small shot of the TB antigen (purified protein derivative, or PPD) is put
under the top layer of skin. The fluid makes a little bump (wheal) under the
skin. A circle may be drawn around the test area with a pen. See an
illustration of a person receiving a
Mantoux
test . Do not cover the site with a bandage. You must see your health
professional 2 to 3 days after the test to have the skin test checked.
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