A fifth individual has died in connection with the ongoing outbreak of Legionnaires’ disease in Central Harlem, New York City health officials confirmed. The announcement was made by Dr. Michelle Morse, the acting health commissioner, who stated that the death of an unidentified person occurred before mid-August and is linked to this particular cluster of cases.
The outbreak was first detected on July 25, 2023, and has since resulted in 108 confirmed cases as of August 15, with fourteen patients hospitalized. The affected areas are primarily within the ZIP codes of 10027, 10030, 10035, 10037, and 10039. Despite the rising number of cases, health officials have indicated that the risk to residents in these communities remains low.
Legionnaires’ disease is a severe form of pneumonia caused by the Legionella bacteria, which thrive in warm water environments. Infection typically occurs when individuals inhale mist contaminated with the bacteria, leading to flu-like symptoms. Symptoms usually manifest between two and ten days post-exposure. According to the U.S. Centers for Disease Control and Prevention, approximately 8,000 to 18,000 Americans are hospitalized with Legionnaires’ disease annually.
The first confirmed case in this particular outbreak was recorded on July 22, 2023. There was a peak of 11 newly diagnosed cases on August 2, followed by a decline in new cases. The latest cases were reported on August 12, according to city data. Dr. Morse noted that, based on epidemiological evidence, remediation efforts in the area have been effective, as the number of new cases continues to decrease.
As part of the ongoing investigation, health officials have conducted sampling and testing of water from cooling towers within the affected zone. While the city has not disclosed how many of these samples tested positive for the bacteria, it has stated that those with initial positive results for Legionella have completed the necessary treatment as mandated by the health department.
“We are continuing to monitor the situation and will inform building management if additional treatment is required,” the health department stated. Authorities remain vigilant as they work to contain the outbreak and mitigate further risks to public health.
