The only contraindication to breastfeeding with TB is active untreated TB. After active tuberculosis is treated for two weeks, breastfeeding can be resumed. In this case, we don't even know if the mother has TB at all, and if she has been exposed to her relative's case, she still may only have a positive PPD and not currently have the disease. I believe that in a case like this, doing an X-ray on the mother during the third trimester can be done, since that would guide treatment. Remember, while she is pregnant, she could be exposing the baby through the placenta. So it is best to determine whether or not she has active infection. If she is a "converter", i.e. she was PPD negative and now is PPD positive with a negative chest x-ray, she needs 6 months of INH, and should be able to breastfeed. If she has active TB, then it is essential to start treatment, and as mentioned above, breastfeeding is OK after two weeks of treatment. Hope this helps. Alicia. [log in to unmask]