TB Blood Test vs TB Skin Test for School
Short answer: A TB blood test such as QuantiFERON or IGRA uses one blood draw. A TB skin test, also called PPD, requires placement and then a return visit for reading. Some schools accept either, while others require a specific type.
Quick answer
A TB blood test such as QuantiFERON or IGRA uses one blood draw. A TB skin test, also called PPD, requires placement and then a return visit for reading. Some schools accept either, while others require a specific type.
How to choose
- If your form says QuantiFERON, IGRA, or TB blood test, choose TB blood testing
- If your form says PPD, TB skin test, or 2-step TB, choose the skin test option
- If your form gives a choice, TB blood testing can be more convenient because it does not require a return reading
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FAQ
Is QuantiFERON a TB blood test?
Yes. QuantiFERON is an IGRA blood test used for TB screening.
Does a TB skin test require two visits?
Yes. A TB skin test requires placement and a return visit for reading.
What is a 2-step TB test?
A 2-step TB test is two separate TB skin test placements/readings, often required by certain schools or employers.
