Tuberculin Status

TB Testing

Documentation of a two-step PPD test or a TB IGRA must be uploaded to the American Data Bank website.

Documentation requirements are listed under each option.

Incoming Juniors must have this test administered after May 15th

Instructions

Initial testing

  • Option 1 – A two step PPD is administered as follows:
  • NOTE: A PPD cannot be placed within 30 days of receiving an MMR or Varicella vaccine unless they are placed on the same day.
    • Step ONE
      • Visit 1, Day 1: PPD antigen is applied under the skin.
      • Visit 2, Day 3: PPD test is read (within 48-72 hrs of placement). If negative continue to the next step. If positive see below.
    • Step TWO
      • Visit 3, Day 7-21: a second PPD skin test is applied (for those that test one was negative). If test is applied before 7 days or after 21 days the entire two step PPD must be repeated.
      • Visit 4, 48-72 hours after placement the second test is read. If negative submit documentation as stated in this section. If positive see the “Positive Results” section of this page.  
  • Option 1 Documentation for each step must include the date test was administered, the date it was read, the result, the size (mm) of induration, the name of the healthcare provider who placed it, and the name of the healthcare provider who read it
  • Option 2 – A TB IGRAs are whole-blood tests. There are two types.
    •  QuantiFERON®-TB Gold In-Tube test (QFT-GIT)
    • T-SPOT® TB test (T-Spot)
  • Advantages of the TB IGRA
    • Requires a single patient visit to conduct the test.
    • Results can be available within 24 hours.
    • Prior BCG (bacille Calmette-Guérin) vaccination does not cause a false-positive IGRA test result.
  • Disadvantages  of the TB IGRA
    • Can be more expensive than a PPD.
    • Please discuss disadvantages with your healthcare provider.
  • Option 2 Documentation is a type written lab report which includes the collection date, the reference range, the result, and the name of the lab. No handwritten reports will be accepted. 

Annual testing

Must be administered within 365 days of the initial two step PPD or TB IGRA. If the annual test is administered on the 366th day a one step PPD is not acceptable (see instructions for initial testing). 

  • Option 1 – a one step PPD Skin test. (Administered within 365 days of initial TB test.)
  • NOTE: A PPD cannot be placed within 30 days of receiving an MMR or Varicella vaccine unless they are placed on the same day. 
  • Option 2 – A TB IGRA can be used as a annual TB test also. 

Positive Results

If you know you test positive for TB OR if you are now testing positive for TB you will need to follow these instructions:

  • Make an appointment with your healthcare provider.
  • Upload a chest x-ray radiology report to American Data Bank. (No handwritten reports will be accepted.)
  • Upload a current TB Symptom Check form completed by your healthcare provider to American Data Bank.
  • If INH treatment was recommended upload document indicating completion date of to American Data Bank.