
2 cases of Legionella infection identified
Extensive testing of the water at UW Medical Center – Montlake has been negative for the bacteria.Media Contact: Susan Gregg - sghanson@uw.edu, 206-390-3226

Two patients treated within the past two months at the University of Washington Medical Center – Montlake were diagnosed with Legionella pneumonia.
These cases were different species. One was considered a possible healthcare-associated infection and the other considered a presumptive healthcare-associated infection. No additional cases of Legionella have been identified at UW Medical Center – Montlake at this time.
Extensive testing of the water in the medical center has been negative for Legionella thus far.
We are working closely with Public Health – Seattle & King County, the Washington State Department of Health, and the Centers for Disease Control and Prevention to review these cases.
UW Medical Center - Montlake has a robust water-management program that includes testing and monitoring of water temperature, chlorine levels and the presence of water-borne bacteria.
“We are working closely with UW Medical Center on the investigation of these cases. UWMC has a strong water-management program in place to help control Legionella and are taking all recommended steps. This includes testing water sources for Legionella and to date, all tests have come back negative for the bacteria,” said Elysia Gonzales, communicable disease manager at Public Health – Seattle & King County.
She added, “Because Legionella is present in the natural environment, it can be difficult to determine the initial source of infections. Legionella is a common water-borne bacteria and most healthy people who get exposed do not get sick. People at increased risk of getting sick include anyone with certain underlying health conditions like chronic lung disease or a weak immune system.”
Patients with concerns should call their local healthcare provider. For more information on Legionella, please refer to the Centers for Disease Control and Prevention website.
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