DefinitionThe tuberculin tine test is used to determine whether someone has been infected with the bacteria that causes tuberculosis. However, the test is rarely used because other tests are more accurate.Alternative NamesTB tineHow the test is performedThis test uses a tiny spiked instrument to inject a small amount of the tuberculosis antigen just under your skin. This is most commonly done on the forearm. Usually, the area is marked with an ink pen so it can be checked for any redness and swelling at a later time, usually in 2 - 3 days.Note: Another test, called the tuberculin skin test, is more accurate than the TB tine test covered in this article. It is the preferred method of determining exposure to tuberculosis.How to prepare for the testThere is no special preparation. People with