The health department in northern Kentucky is enacting a new rule for all public pools. Children who are not potty trained are no longer allowed in public pools, even those wearing swim diapers.

The health department says it will protect the community from the highly contagious bacteria called Shigellosis, which can easily be spread, even in highly chlorinated pools.

“Even if your child is healthy, you don’t know about other children or other toddlers who are not toilet trained who’ve been in that water,” said Dr. Lynne Saddler, NKY District Director of Health.

Shigella is very common among children, and symptoms include diarrhea, fever, cramps and vomiting.