A widening outbreak of shigella in northern Kentucky has residents keeping out of public swimming pools.

Eagle Country reports the Northern Kentucky Health Department says they’ve counted 74 cases, six of those in Boone County, as of June 7. The number of cases in an average year is 25.

The health department asks those who have been ill to stay out of the water for two weeks. Pools should also not allow non-potty trained children to be in them until further notice.

Some public pools, such as the Florence Aquatic Center, have closed while they undergo super chlorination.