I did not get the Thrush from the baby or the breast milk but from the bottle that was not sterilized. If I understand Thrush correctly, the baby gets it from the mothers breast. The baby then had thrush and was given a bottle of breast milk. That nipple on the bottle was not sterilized prior to using it again. I drank from it to test the temp. The next day whamo, Thrush. I can see why babies cry alot and have trouble eating when they have Thrush.