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A member asked:

What is injected in your arm when getting a tb skin test and is it safe for the baby to get the test when 21+ weeks pregnant?

2 doctor answers2 doctors weighed in
Dr. John Chiu
Allergy and Immunology 58 years experience
Yes: It is called PPD for TB testing and there is no known contraindication for getting one unless you were tested positive before.
Dr. Marc Goldhagen
Occupational Medicine 34 years experience
PPD: Purified protein derivative which are TB proteins which, if you have a previous exposure to TB will cause a reaction called a "wheel." Your baby in utero will be safe as the proteins will stay right where they put them and not cross the placenta.

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Last updated Aug 12, 2014

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