Confirm which screening you need
TB screening may be requested by an employer, school, or other program. A TB skin test may be called a PPD, Mantoux test, or tuberculin skin test (TST). Bring the written requirement so the clinic can confirm the appropriate service. TB blood tests and skin tests are different methods; call your clinic to confirm the method you need is available.
Tell staff about prior positive TB tests, previous TB treatment, and any current symptoms before arranging screening.
Plan both skin-test visits
A TB skin test involves placement and a separate reading by a trained health professional 48–72 hours later. Plan the return visit with the clinic before the test is placed; a photograph or your own interpretation does not replace that reading.
If the reading window is missed, a repeat test may be needed. Contact the clinic for instructions.
Check the clinic’s opening hours for the return visit, including weekends and holidays, before placement. Ask how the reading will be documented for your employer or program.
What to bring and confirm
Call ahead to confirm test availability, age requirements, the accepted documentation, and whether your employer or program requires a particular testing schedule.
- Bring the employer or program form and any authorization.
- Bring previous TB screening results and relevant treatment records.
- Confirm whether staff can read a test placed elsewhere and what placement documentation they need.
- Ask about both visits and any associated fees before starting.
Frequently asked questions
When do I return for a skin-test reading?
The reading is performed 48–72 hours after placement. Confirm the clinic’s return arrangements before the first visit.
Can you read a test placed at another facility?
Call the clinic before attending. Staff need to confirm whether they can accept the placement record and perform the reading within the required window.
Do you offer TB blood testing or two-step testing?
Confirm the exact method and schedule with your clinic and the organization requesting the test. Do not assume those options are available from the general TB screening listing.
What if a previous TB test was positive?
Tell the clinic before arranging another test and bring the previous result. A provider can advise on the appropriate next step.