A member asked:

How is the ppd skin test measured?

A doctor has provided 1 answer

Size of induration: The tuberculosis skin test (PPD) is measured between 48-72 hrs after placement. The area of induration (palpable, raised, hardened area) around the site of injection is measured and this represents the reaction to tuberculin.

Answered 7/25/2018

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Related Questions

A member asked:

I just had a PPD test done and feel little bit unwell?

A doctor has provided 1 answer