Outbreak of Legionnaires’ Disease in New York City: 58 Diagnosed, Two Dead; Health Department Acts to Safeguard Residents

In New York City, health officials have confirmed 58 cases of Legionnaires’ disease, a severe respiratory infection caused by the bacteria Legionella, and two associated fatalities. The city’s health department has identified cooling towers situated in Central Harlem as the suspected source of the outbreak.

Cooling towers, positioned on buildings’ rooftops, release mist into the air during the cooling process of large structures. If the internal water becomes overly warm, stagnant, or insufficiently disinfected, Legionella can proliferate and pose a threat to individuals who inhale the resulting mist. It is important to note that Legionnaires’ disease cannot be transmitted from person to person.

On July 25, the city health department publicized the emergence of this cluster and pledged to test all cooling towers in the vicinity. As of Monday, remediation has been completed on 11 cooling towers that tested positive for Legionella pneumophila bacteria during initial screenings.

Dr. Michelle Morse, Acting Health Commissioner, urged individuals residing within the affected zip codes to seek medical attention promptly if they are experiencing flu-like symptoms.

Legionnaires’ disease exhibits symptoms similar to those of the flu, such as cough, fever, headaches, muscle aches, and shortness of breath. Although treatable with antibiotics, failure to receive treatment can lead to life-threatening complications such as shock and multi-organ failure, according to the World Health Organization. The Centers for Disease Control and Prevention (CDC) reports that around 10% of Legionnaires’ disease patients succumb to their illness, with older adults and individuals with compromised immune systems being at higher risk.

Approximately 6,000 cases of Legionnaires’ disease are reported annually in the United States, according to the Occupational Safety and Health Administration. However, it is believed that the actual number of cases may be higher due to challenges associated with distinguishing Legionnaires’ disease from other forms of pneumonia.