Published on: April 28, 2026, 03:55h.
Updated on: April 28, 2026, 03:55h.
- Health authorities are examining two travel-related cases of Legionnaires’ disease involving visitors who stayed at Wynn Las Vegas during late 2025 and early 2026.
- Environmental samples have indicated the presence of Legionella bacteria, leading Wynn to implement a thorough disinfection and remediation of its water system.
- The Southern Nevada Health District (SNHD) is requesting that all guests who checked in at the resort on or after September 1, 2025, complete a confidential survey to aid in the ongoing inquiry.
The Southern Nevada Health District (SNHD) is conducting an investigation into two travel-related cases of Legionnaires’ disease that are connected to separate stays at Wynn Las Vegas. The agency is encouraging recent guests to fill out a confidential survey regarding any illnesses as part of its ongoing response.
As reported by SNHD, two individuals who stayed at Wynn Las Vegas months apart—one in September 2025 and another in February 2026—contracted the waterborne respiratory illness but have since recovered. Following these reported cases, SNHD conducted environmental tests at the venue, discovering Legionella bacteria in several water samples.
In response, Wynn Las Vegas launched what officials termed an “immediate and comprehensive” remediation of its water system, which involved disinfection and flushing of the compromised areas.
SNHD stated that subsequent tests returned no detectable levels of Legionella, although additional analyses are ongoing as the investigation continues. The resort is collaborating with health officials and has begun notifying guests who may have been at risk. The SNHD confirmed that direct outreach is standard protocol when Legionella contamination is identified in a facility’s water supply.
As part of this investigation, SNHD encourages anyone who stayed at the Wynn after September 1, 2025, to participate in the confidential illness survey—even if their symptoms were mild or have subsided. Authorities emphasized that this survey is critical for identifying additional cases, assessing the exposure timeline, and shaping any subsequent public health measures.
Understanding Legionnaires’ Disease
Legionnaires’ disease is a type of pneumonia caused when individuals inhale water droplets containing Legionella bacteria. Symptoms typically present 2 to 10 days after exposure, with a maximum incubation period of up to two weeks. Health experts recommend that guests monitor for signs including coughing, shortness of breath, fever, muscle pain, and headaches, and seek medical attention should any symptoms arise.
The Centers for Disease Control and Prevention (CDC) estimates that Legionnaires’ disease leads to the deaths of 500 to 700 individuals in the United States annually, with about 1 in 10 individuals suffering severe complications resulting in death.
Wynn guests are advised to inform their healthcare provider about any possible exposure to ensure appropriate testing and treatment.
Individuals who are at greater risk for severe illness include those aged 50 and above, current or previous smokers, people with chronic respiratory conditions or compromised immune systems, and those undergoing treatments such as chemotherapy or those on immunosuppressive medications.
Pre-existing conditions such as diabetes, kidney failure, or liver disease can further heighten vulnerability.
The SNHD helpline (702-759-4636) is available from Monday to Friday, between 8 a.m. and 4:30 p.m., for any inquiries regarding symptoms, testing, or the investigation.
For further information on Legionnaires’ disease, including preventive measures and risk factors, please visit the Centers for Disease Control and Prevention website.