Hi, If the mother is a MRSA carrier but is not infected (especially vagina) when giving birth, then, cannot give to child. However, if she would have vaginal infection of MRSA and giving birth through vagina, then, the baby will carry the infection. Usually, if the baby will have such infection, he/she will not eat/drink milk, have high fever within the first days after giving birth. Having sores in the butt and vagina of your baby does not necessary mean she has MRSA. It might be because of: - allergy to baby napkins - her skin is very delicate and should be washed after passing the urine or bowel movement. - her urine is very concentrated and can irritate the local skin; you should give her more water. - you should look at her stool for possible worms (pinworms) or send her stool to the lab to examine for ova/parasites - possible thrush (especially true if you have used antibiotics). If this is true, apart keeping the area well cleaned and dried, should apply baby cream and clotrimazole/miconazole cream (otc) All the best! Dr.Sonila