A 17-year-old female asked:
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i was on some sort of medication for tb when i had mantoux test when i was young and i'm scared my blood result will say something negative. help?

1 doctor answer
Dr. Brian Lee
Dr. Brian Lee answered
16 years experience Internal Medicine
Get a cxr: Get a chest xray. This will eliminate your concerns for active TB if you don't have it.
Answered on Jan 24, 2015

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Very often: You may have been exposed but not infected. Or this can be a lab error.
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Yes: With a positive PPD- it important to insure that you don't have an active TB infection.

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