Treatment of tuberculosis is not a contraindication for breast feeding. Breastfeeding should not be discouraged for women being treated with first-line anti-tuberculosis drugs because the concentrations of these drugs in breast milk are too small to produce toxicity in the nursing newborn. The child cannot be infected by the mother breast milk, unless she has tuberculous mastitis. Ref: Manual of Neonatal Care By John P. Clohey, Eric C. Eichenwald, Ann R. Stark, Page 303.