Southern Nevada Health District conducting Legionnaires’ disease investigation at the Wynn Las Vegas, guests urged to complete health survey
FOR IMMEDIATE RELEASE:April 28, 2026
LAS VEGAS—The Southern Nevada Health District is investigating two travel-associated cases of Legionnaires’ disease associated with stays at the Wynn Las Vegas. One person stayed at the property in September 2025 while the other stayed in February 2026. Both individuals have since recovered.
Following notification of these cases, the Health District conducted environmental sampling at the facility. Multiple samples tested positive for Legionella, the bacteria that can cause Legionnaires’ disease. In response, the Wynn initiated immediate and comprehensive water system remediation measures, and the most recent samples indicate no detectable levels of Legionella in the affected areas. The property is also conducting ongoing follow-up testing to help ensure the continued safety of its water systems. The facility is cooperating with the Health District’s investigation, has initiated direct guest notifications regarding potential exposure, and is implementing precautionary measures designed to mitigate any further risk of illness.
The Health District is strongly urging all guests who stayed at the Wynn Las Vegas on or after September 1, 2025, to complete a confidential illness survey, at https://survey.alchemer.com/s3/8815488/Outbreak-Survey-2026-00015, even if symptoms were mild or have already resolved. Completing this survey is critical to the investigation and helps public health officials quickly identify any additional cases and ensure appropriate follow-up. Those who are currently experiencing symptoms should seek medical attention and inform their primary care provider of the potential exposure.
Legionnaires’ disease symptoms typically begin within two to 10 days after exposure to the bacteria. However, people should watch for symptoms such as cough, shortness of breath, fever, muscle aches and headaches for up to two weeks after exposure.
People who are at increased risk of getting sick include:
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- People 50 years or older
- Current or former smokers
- People with chronic lung disease
- People with weakened immune systems
- People who take drugs that can weaken their immune systems (after a transplant operation or chemotherapy)
- People with underlying illnesses such as diabetes, kidney failure or liver failure
Anyone with additional questions can contact the Health District’s Helpline at (702) 759-4636 (INFO), Monday – Friday, from 8 a.m. – 4:30 p.m. More information on Legionnaire’s disease is available on the Centers for Disease Control and Prevention website at www.cdc.gov/legionella/index.html.
The Southern Nevada Health District serves as the local public health authority for Clark County, Boulder City, Henderson, Las Vegas, Mesquite and North Las Vegas. The agency safeguards the public health of the community’s residents and visitors through innovative programs, regulations, and initiatives focused on protecting and promoting their health and well-being. More information about the Health District, its programs, services, and the regulatory oversight it provides is available at www.SNHD.info. Follow the Health District on Facebook, Twitter, and Instagram.