Key Takeaway:
- Two recovered guests were diagnosed with 2 Legionnaires’ Disease after stays at Wynn Las Vegas in 2025 and 2026.
- Legionella bacteria were detected, prompting water system cleaning; recent tests show no contamination.
- Health officials urge past guests since Sept. 1, 2025, to complete an illness survey and seek care if symptoms appear.
Health officials are investigating 2 Legionnaires’ Disease cases linked to stays at Wynn Las Vegas in September 2025 and February 2026, leading to revisions in the water system, guest notifications, and ongoing monitoring.
Health Officials Probe Cases Linked To Resort Stay
The Southern Nevada Health District is investigating 2 Legionnaires’ Disease cases connected to guests who stayed at Wynn Las Vegas, officials said Wednesday.
One individual stayed at the resort in September 2025, and another visited in February 2026. Both guests have since recovered, according to the Health District.
Officials launched the investigation after confirming the illnesses and conducted environmental sampling across the property. Tests detected Legionella bacteria in multiple water samples, health authorities said.
“Environmental testing identified the presence of Legionella bacteria, which triggered immediate corrective actions,” the Southern Nevada Health District said in a statement.
2 Legionnaires’ Disease is a severe form of pneumonia caused by inhaling water droplets contaminated with Legionella bacteria, and the illness does not spread from person to person.
Resort Revises Water System After Bacteria Detection
Following the discovery, Wynn Las Vegas completed a comprehensive revision and cleaning of its water system, officials said.
Recent follow-up testing found no detectable Legionella bacteria in water samples, though monitoring will continue as a precaution.
“The property has cooperated fully with the investigation and implemented corrective measures to mitigate future risk,” health officials said.
The resort also launched a guest notification system to inform visitors of potential exposure. Authorities said the precaution aims to ensure transparency while investigators assess whether additional cases exist.
Wynn Las Vegas plans to continue routine testing and additional preventive measures under guidance from public health officials.
Legionella bacteria can grow in large building water systems, including cooling towers, decorative fountains, and plumbing systems, particularly when water temperatures or maintenance practices allow bacterial growth.
Officials Urge Guests To Report Symptoms, Seek Care
The Health District is urging anyone who stayed at Wynn Las Vegas on or after Sept. 1, 2025, to complete a confidential illness survey to assist investigators.
Officials said participation is critical, even for individuals who experienced mild symptoms or have already recovered.
Symptoms of 2 Legionnaires’ Disease usually appear two to ten days after exposure and may include cough, shortness of breath, fever, muscle aches, and headaches.
Health authorities advise anyone experiencing symptoms to seek medical care and inform providers about possible exposure at the resort. Early treatment with antibiotics is generally effective when diagnosed promptly.
Public health officials emphasized that the risk to the broader community remains low but said ongoing surveillance is necessary to prevent additional cases.
“The investigation remains active as we continue to evaluate potential exposure and ensure appropriate safety measures are maintained,” the Health District said.
Officials did not report any additional confirmed cases as of Wednesday.
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