I have two words to say about false nails in the NICU...NO WAY!!!

Our staff are not allowed to wear them under any circumstance and random nail checks are done by coordinators to make sure that our nails are the correct length and that we are not wearing nail polish. At first this policy was met by a lot of those who felt that their rights were being violated but our admin stood strong on behalf of our babies safety with the backing of the infection control department. I personally believe that parents should be told that if they must keep their false nails they need to wear gloves. No, they are not going from baby to baby like staff but artificial nails are known for harboring fungus and bacteria and even causing sepsis is severe cases in wearers.
Nails need to be kept short and smooth when working with preemies delicate skin...I feel a lot of this should be common sense and something your coworker should want to do for the good of their tiny pts

Same goes for diamonds and other gemed jewelry...this only provides groves for "bugs" to ride from one baby to another no matter how well you wash your hands. We were wearing one plain band until random swabs of the skin under our rings showed that this was also a good spot for germs to harbor.
I know I'm probably "preaching to the choir" because you are the one doing the research you are the one that is concerned for the health of the babies.
Good for you! Keep it up!