Southern Nevada Health District officials confirm there were seven cases of Legionnaires’ disease and 28 additional suspected cases following an outbreak at the Rio Las Vegas Hotel and Casino over the summer.

The outbreak was reported in May after two guests tested positive for the disease. Additional cases were reported by guests who had returned to their hometowns.

There were also 59 suspected cases of Pontiac fever, which is also a respiratory infection but milder than Legionnaires’ disease.

Health officials gave the following statement to 8 News NOW:

“The Southern Nevada Health District’s investigation is continuing. To date, the Health District has been able to confirm seven cases of Legionnaires disease associated with this investigation. The investigation will continue so the Office of Epidemiology and Disease Surveillance staff members remain available to speak with guests who have questions, or might have been ill. Our Environmental Health Division continues to work with the Rio All-Suite Hotel & Casino. Using best practices, the hotel has installed a secondary disinfection system as part of its water management program to ensure the safety of its guests.”