A procedure used for the baseline testing of person who will periodically receive TSTs (e.g., health care workers) to reduce the likelihood of mistaking a boosted reaction for a new infection. If the initial TST result is classified as negative, a second test is repeated one (1) to three (3) weeks later. If the reaction to the second test is positive, it probably represents a boosted reaction. If the second test is also negative, the person is classified as not infected. A positive reaction to a subsequent test would indicate new infection (i.e., a skin-test conversion) in the person.
15 Miss. Code. R. 16-1-48.2.15