Two Legionnaires Disease Cases Reported at Wynn Las Vegas
Posted on: April 28, 2026, 03:55h.
Last updated on: April 28, 2026, 03:55h.
- Health officials are investigating two travel-related Legionnaires’ disease cases involving guests who stayed at Wynn Las Vegas in late 2025 and early 2026
- Environmental samples initially tested positive for Legionella bacteria, prompting Wynn to undergo a comprehensive water system disinfection and remediation process
- SNHD is urging all guests who stayed at the resort on or after September 1, 2025, to complete a confidential survey to assist in the ongoing investigation
The Southern Nevada Health District (SNHD) is investigating two travel-related cases of Legionnaires’ disease linked to separate stays at the Wynn Las Vegas and is urging recent guests to complete a confidential illness survey as part of its ongoing response.
According to SNHD, two individuals who stayed at the property months apart — one in September 2025, the other in February 2026 — came down with the waterborne respiratory infection and have since recovered. After the illnesses were reported, SNHD conducted environmental sampling at the property and detected Legionella bacteria in multiple water samples.
Wynn Las Vegas initiated what officials described as “immediate and comprehensive” water‑system remediation, including disinfection and flushing of affected areas.
SNHD said the most recent follow‑up samples showed no detectable Legionella, though additional testing is continuing as the investigation remains active. The resort is cooperating with public‑health officials and has begun notifying guests who may have been exposed. SNHD noted that direct outreach is standard protocol when Legionella is found in a facility’s water system.
As part of the investigation, SNHD urges anyone who stayed at the Wynn on or after September 1, 2025 to complete this confidential illness survey — even if symptoms were mild or have resolved. Officials said the survey is essential for identifying additional cases, determining the extent of exposure, and guiding any further public‑health response.
What is Legionnaires’ Disease?
Legionnaire’s disease is a pneumonia caused by inhaling water droplets containing Legionella bacteria. Symptoms typically appear two to 10 days after exposure, but can take up to two weeks to develop. Health officials advise guests to watch for cough, shortness of breath, fever, muscle aches and headaches, and to seek medical care if symptoms occur.
The CDC estimates that Legionnaires’ disease kills between 500-700 people in the U.S. each year. About 1 out of every 10 people who contract the illness will die due to complications from it.
Guests of the Wynn should inform their healthcare provider about potential exposure to ensure appropriate testing and treatment.
People at higher risk of developing severe illness include adults 50 and older, current or former smokers, those with chronic lung disease or weakened immune systems, and people undergoing treatments such as chemotherapy or taking medications that suppress immune function.
Underlying conditions such as diabetes, kidney failure, or liver disease can also increase susceptibility.
SNHD’s helpline (702-759-4636) is available Monday through Friday from 8 a.m.-4:30 p.m. for anyone with questions about symptoms, testing, or the investigation
Additional information about Legionnaires’ disease, including prevention and risk factors, is available through the Centers for Disease Control and Prevention website.
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