4 doctors weighed in:

What disease does it test for when they inject fluid into your arm to see if the bump goes down or not?

4 doctors weighed in
David Miller
Family Medicine
3 doctors agree

In brief: PPD for TB

This sounds like a test for tuberculosis.
Purified protein derivative is a marker for infection with tb. It is injected under the skin. If you have TB or have been exposed to tb, the area around the injection turns red and swells.

In brief: PPD for TB

This sounds like a test for tuberculosis.
Purified protein derivative is a marker for infection with tb. It is injected under the skin. If you have TB or have been exposed to tb, the area around the injection turns red and swells.
David Miller
David Miller
Answer assisted by David Miller, Medical Student
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