TST Step II Screening
The Mantoux Tuberculin Skin Test (TST) is a screening method developed to
evaluate an individual’s status for active Tuberculosis (TB) or Latent TB infection.
The step II test is performed in two stages.
The first test is to be administered within three months of entrance into the school
and documented. All positive results are to be followed up by your primary care
physicians before you enter school. Proper documentation is required as to your
TB history. Your previous treatment for this disease (include specific dates),
current x-ray results are to be provided.
The second step of the TB screening process is to be performed between two
weeks to three months after the first test by your PCP before classes begin. This
test is performed if the results of the first test were negative.
The second step of this screening is to reduce the likelihood that a “boosted
effect” will be misinterpreted as a recent infection or new conversion. The
“booster effect” is a delay-type of hypersensitivity reaction. A positive reaction to
the second test probably is a boosted reaction (indicating a past infection or BCG
vaccination).
This Step II policy is designed to reduce the potential of overestimation of new
infections. The Step II testing is used for initial skin testing before your entrance
to school. Thereafter, a TST will be performed annually or periodically if you
have had an exposure.
Please have your PCP fill out the separate Step II documentation sheet provided
in your packet and submit to Student Health.
This Step II procedure must be performed even if you have had annual screening
in the past.