Waukesha County health officials said Thursday they’re investigating two confirmed cases of cryptosporidiosis.

Those affected recently swam at the Princeton Club in New Berlin, but the original source is unknown, a county spokeswoman said.

“Princeton Club has been very cooperative, have followed all Waukesha County Environmental Health requirements and have taken steps that go above and beyond the standards to ensure appropriate prevention steps are taken,” Julianne Davan said in a statement.

She said it’s not uncommon for annual reports of cryptosporidiosis, and the number of cases in Waukesha County this year is consistent with previous years.