Causes of oral thrush in babies. Oral thrush is caused by a yeast fungus called Candida albicans. Healthy people have this fungus in their mouths and it doesn't normally cause problems. Antibiotics reduce the levels of healthy bacteria in your baby's mouth, which can allow fungus levels to increase.
Is thrush contagious from baby to mom?
Oral thrush, a fungal infection, is not considered contagious. Conversely, mothers may develop a Candida albicans yeast infection on their nipples while taking antibiotics or steroids and transfer the infection to their babies while breastfeeding. The incubation period for oral thrush is about two to five days.
What are the symptoms of thrush in babies?
Symptoms of thrush in the baby include:
- White, velvety sores in the mouth and on the tongue.
- Wiping the sores may cause bleeding.
- Redness in the mouth.
- Diaper rash.
- Mood changes, such as being very fussy.
- Refusing to nurse because of soreness.