Why and how does a baby get thrush?

Our baby is 1 month old and we would like information on thrush. Why and how does a baby get it?

Thrush is an oral infection from a yeast called Candida. This yeast is normally found in the mouth and gastrointestinal tract, where it is usually harmless. It is also found in the vagina, and your baby may have first come into contact with the yeast during her passage through the birth canal. For some reason, newborns seem more susceptible to infections from the yeast - probably, in part, because of the normal immaturity of their immune system. As yeast organisms multiply in the mouth, you see white patches on the tongue, the palate (roof of the mouth) and the lining of the cheeks and gums. Even though it may look bad, thrush generally doesn't bother the baby. It is usually treated with a prescription liquid anti-yeast medicine, given orally. This treatment is usually very effective and well tolerated by babies. If you're breastfeeding, the yeast infection might be on your breasts, as well as in your baby's mouth, and cause a burning or painful tingling sensation. You should apply the same medicine to your breasts while treating the baby.