Legionnaires’ Disease Spreads in NYC Through Building Cooling Towers

Since July 25, at least 58 people in New York City have been diagnosed with Legionnaires’ disease, and two people have died, according to the New York City Health Department. Legionnaires’ disease is a bacterial lung infection, or pneumonia, that is caused by the bacteria Legionella pneumophila, which grows in warm water.

The NYC health department completed remediation at 11 cooling towers in Harlem where initial positive screening results showed the presence of Legionella pneumophila. People can get Legionnaires’ disease by breathing in water vapor that contains Legionella bacteria. Legionnaires’ disease cannot be transmitted from person to person.

Legionnaires’ disease causes flu-like symptoms and is treatable with antibiotics. However, if left untreated, it can result in shock and multi-organ failure. Complications from the disease are less likely the earlier treatment begins.

“Legionnaires’ disease can be effectively treated if diagnosed early, but New Yorkers at higher risk, like adults aged 50 and older and those who smoke or have chronic lung conditions, should be especially mindful of their symptoms and seek care as soon as symptoms begin,” said Dr. Michelle Morse, NYC Health Department Acting Health Commissioner.

Legionnaires’ disease can be caused by plumbing systems where conditions are favorable for Legionella growth, such as cooling towers, whirlpool spas, hot tubs, humidifiers, hot water tanks, and evaporative condensers of large air-conditioning systems.