<prompt> Answer this question truthfullyWhat is the minimum size of induration in the Tuberculin skin test TST that is considered positive in HIV-positive individuals?  <response>: <reason> The minimum size of induration in the Tuberculin skin test TST that is considered positive in HIV-positive individuals is 5 mm. The TST is a diagnostic test used to detect the presence of tuberculosis TB infection. It involves injecting a small amount of purified protein derivative PPD into the skin and then measuring the size of the resulting induration after a certain amount of time has passed. The interpretation of the test depends on a number of factors, including the individuals risk of TB exposure, age, and immunological status. In HIV-positive individuals, a TST induration size of 5 mm is considered positive, as these individuals are at higher risk of developing TB disease due to their weakened immune system. 