DuPage County health officials say they have linked two cases of Legionnaires' disease to a hot tub at an LA Fitness club in Naperville.



The men came down with the respiratory disease toward the end of October, according to Jason Gerwig, a spokesman for the DuPage County Health Department. He said both men were "medically stable" but would not elaborate.



After looking for a "common denominator," authorities were able to narrow it down to a hot tub at the Naperville LA Fitness at 1836 Freedom Dr., Gerwig said. Health officials closed down the hot tub Oct. 23, but the rest of the club remained open, he said.

The DuPage County Health Department and the Illinois Department of Public Health tested the facility, including the pool and showers, and results were negative, according to Gerwig. No new cases have been reported.



He said the hot tub will remained closed until cleaning and inspection, which could take another month.



LA Fitness staffers have been "great" in assisting authorities and addressing concerns, Gerwig said.



Legionnaires' disease is a lung inflammation usually caused by infection. People usually are infected by breathing in mist from water that contains the bacteria. The mist may come from hot tubs, showers or air-conditioning units for large buildings.