New York City has plenty of things floating through the air—taxi exhaust, construction dust and the occasional pigeon with questionable intentions. Legionella bacteria was not supposed to be on the list.
But Legionnaires’ disease in NYC is making headlines again after the Health Department announced a new community cluster in the South Bronx. As of September 10, five people in parts of Melrose and Morrisania had been diagnosed, and one person had died. Officials are investigating additional potential cases.
The timing is particularly unsettling. This is the city’s second major Legionnaires’ disease cluster of the summer, following a deadly outbreak on Manhattan’s Upper East Side that sickened more than 90 people and killed seven, according to the Health Department.
So what exactly is Legionnaires’ disease? It’s a serious form of pneumonia caused by Legionella bacteria, which naturally occur in the environment and can multiply in warm water. People generally become infected by breathing in contaminated water mist—not by drinking tap water and, importantly, not from another person.
That makes New York’s cooling towers a major focus. These rooftop systems can create the fine mist that allows Legionella to travel through the air. City health officials are testing cooling towers in the affected South Bronx neighborhoods and will require remediation of towers that test positive.
Symptoms can look deceptively ordinary at first: fever, cough, chills and muscle aches, with more serious cases developing breathing difficulties. Older adults, smokers and people with certain underlying conditions face greater risk. The good news? Legionnaires’ disease can be treated with antibiotics, particularly when diagnosed early.
For New Yorkers, the message isn’t panic—it’s awareness. If you’ve recently been in the affected South Bronx area and develop flu-like symptoms, health officials recommend contacting a medical provider promptly.
Because apparently in New York, even the air-conditioning system has a plot twist.
