The Department of Health confirmed on Sunday morning that the number of legionnaires' cases in Upper Manhattan has risen to 27.
The cluster affects humans in Hamilton Heights and Washington Heights. Three people are hospitalized, the Ministry of Health said on Sunday.
Officials confirmed 12 days ago that a person died from complications related to the disease.
Most infected individuals are over 50 years of age The number of cases has risen steadily in recent weeks, with health officials confirming at least eight cases on July 11.
City officials warn New Yorkers to be vigilant when they live in the lower Washington Heights or Northern Hamilton Heights, and have not felt any symptoms due to the two-week incubation period of the disease.
Health officials said they inspected more than a dozen cooling towers and ordered multiple developers to use biocides to kill off the bacteria associated with the disease.
Legionnaires ™ is a form of pneumonia contracted by the inhalation of water droplets contaminated with the bacterium Legionella. Most cases can be attributed to sanitary systems, where the conditions for Legionella are favorable.
Adults who experience influenza-like symptoms, fever, cough, or difficulty breathing should seek medical attention immediately.
The disease is not contagious
The city sees an average of 200 to 500 legionnaires each year.
NYC Health + Hospitals said on Saturday night that low levels of Legionella bacteria in the water supply were found by Jacobi Medical Center in the Bronx, but officials from the Ministry of Health said it is not affiliated with the cluster in Upper Manhattan.