A fifth person has died from legionnaires' disease in Manhattan's Upper East Side outbreak, health officials confirmed Tuesday, as the city reported 82 total cases and said it believes the source of contamination has been eliminated.
The outbreak has been traced to cooling towers in buildings across the neighborhood. The health department identified live legionella bacteria in 34 cooling tower systems spanning 33 buildings. All 34 towers have been cleaned and disinfected, while nine others returned negative results. Tests on roughly 140 remaining cooling tower systems are expected over the coming week.
Of the 82 cases identified, five people have died, eight remain hospitalized, and 56 have been discharged. The city has recorded no new diagnoses in six days and no new symptoms reported in over ten days, though officials cautioned these figures could change as investigations continue.
City Health Commissioner Alister Martin said the city responded with an aggressive testing and remediation campaign following the first confirmed cases. "We believe that through our aggressive strategy of testing and remediation we have eliminated the source of exposure," Martin said Tuesday. He pledged to hold accountable anyone found violating local public health laws.
Legionnaires' disease is a serious pneumonia caused by legionella bacteria, spread through contaminated water mist rather than person-to-person contact. While antibiotics can treat it, the CDC estimates that about one in ten infected people die from complications.
Julie Menin, the city council speaker whose district includes parts of the Upper East Side, called the situation a "serious public health emergency" and announced an emergency oversight hearing. She noted that one recent victim was just 32 years old and worked in the medical profession.
Mayor Zohran Mamdani reassured residents that tap water, bathing, showers, cooking, and home air conditioning remain safe. He said the city would continue inspecting cooling towers and aggressively enforce health laws going forward.
Author James Rodriguez: "The speed of this outbreak and the death toll underscore how critical proper cooling tower maintenance is in dense urban environments, and the city's willingness to acknowledge gaps in oversight after the fact won't satisfy the families who lost loved ones."
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