![]() Tuberculin manufacturer, lot number and expiration date.Location of test (e.g., right forearm, left forearm, alternate site).Name and signature of person administering test.Regulations for TB Control in Minnesota Health Care Settings. ![]() HCWs and patients with positive TST results must receive appropriate medical follow up.Disregard BCG history when interpreting TST results. People who have been vaccinated with BCG should not be exempted from TB skin testing unless they have a documented positive result from a prior test.The cut-off points for a positive TST result depend on the individual’s risk factors for TB exposure or for developing active TB disease if infected. Candidates for Treatment of Latent Tuberculosis Infection (PDF).Measuring induration Source: Centers for Disease Control and Prevention Health care workers (HCWs), patients, or their family members should not be allowed to record their own TST results.The indurated area should be measured across the forearm (perpendicular to the long axis).The reaction should be measured in millimeters of induration (palpable, raised, hardened area or swelling).If the test is not read within 72 hours, another TST should be placed unless the amount of induration is ≥ 10 mm within 7 days after placement.The skin test reaction should be read between 48 and 72 hours after administration.The TST is an intradermal injection of 0.1 ml of tuberculin (PPD) on the inner surface of the forearm.Injecting tuberculin Source: Centers for Disease Control and Prevention Note: to remove the watermark on the document, click on the document's footer then click on the watermark text. Includes guidance for administration, reading, and interpreting TSTs. Tuberculin Skin Testing (TST) Protocol for Screening Health Care Workers (Word).Tuberculin Skin Testing (TST): Storage of Tuberculin and Need for Orders to Administer (PDF).People who have been vaccinated with Bacille Calmette-Guérin (BCG) should not be exempted from TB skin testing unless they have a documented positive result from a prior test. The preferred term for the test is tuberculin skin test, or TST. Tuberculin (also called purified protein derivative or PPD) is the solution used to administer the test. Mantoux refers to the technique for administering the test. The terms Mantoux, TB skin test, tuberculin skin test, and PPDs are often used interchangeably. Tuberculin skin tests (TST) are administered to detect the presence of Mycobacterium tuberculosis, the bacterium that causes tuberculosis (TB).
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