NYC health officials are investigating a South Bronx Legionnaires’ cluster after one death and five cases.
Why it matters: The outbreak is a fast-moving public-health issue with direct implications for building safety, city enforcement and liability in dense neighborhoods. Officials say the bacteria can spread through cooling towers, making rapid testing and remediation critical.
- NYC Health launched the investigation Sept. 10 in Melrose and Morrisania, including ZIP codes 10451 and 10456.
- As of Sept. 10, the city said five people had been diagnosed and one person had died.
- The Health Department said it had finished cooling-tower sampling and would order full remediation for towers that test positive.
- Officials said this is the second community Legionnaires’ cluster identified in New York City this summer, after an Upper East Side cluster in July.
New York City health officials are investigating a likely community cluster of Legionnaires’ disease in the South Bronx, centered on Melrose and Morrisania.
The city said on Sept. 10 that five people had been diagnosed in the affected area and one person had died in connection with the cluster. Confirmatory results for other potential cases were still pending.
NYC Health said it had completed cooling-tower sampling in the area and that any tower testing positive for Legionella would be ordered to undergo full remediation, including draining, cleaning and disinfecting.
Dr. Alister F. Martin, the city health commissioner, said investigators had confirmed five cases and were moving quickly to identify any additional cases. He said any positive cooling tower would be directed to undergo full cleaning and disinfection immediately.
The department said Legionnaires’ disease is not contagious and can be treated with antibiotics when caught early. The illness is caused by Legionella bacteria, which grow in warm water and can spread through mist from cooling towers.
The city advised people who live, work or visited the affected area since late August and who have fever, cough or difficulty breathing to seek medical attention promptly. Public outreach was scheduled to begin Sept. 11, including flyers in multiple languages, website updates and town halls. A virtual town hall was scheduled for Sept. 13 at 3 p.m.
The Bronx cluster is the second community outbreak identified in New York City this summer, following an Upper East Side cluster in July. The city has not identified the specific source building or buildings in the South Bronx investigation.
By the numbers
- 5 - People diagnosed in the South Bronx cluster as of Sept. 10
- 1 - Death reported in connection with the cluster
- 2 - NYC community Legionnaires’ clusters identified this summer
Yes, but: The city has not said which building or buildings are linked to the outbreak, and it is not yet clear whether any tower has tested positive for live Legionella.
What's next: NYC Health said public outreach starts Sept. 11, and a virtual town hall is scheduled for Sept. 13 at 3 p.m. Officials will continue case confirmation and tower remediation.