New York City is currently investigating a Legionnaires’ disease outbreak on the Upper East Side. The outbreak has resulted in five deaths and 82 diagnosed cases according to the New York City Department of Health and Mental Hygiene, with eight patients still hospitalized. Health officials have not reported new cases in the last six days, suggesting that the sources of exposure might have been eliminated, although investigations are ongoing.
Understanding Legionnaires’ Disease
Legionnaires’ disease is a severe form of pneumonia caused by the Legionella bacteria found in tiny water droplets. Common sources of infection include cooling towers, hot tubs, and plumbing systems in buildings. The bacteria can also be present on cruise ships and in spas. According to the CDC, person-to-person transmission is rare.
Dr. Dana Mordue, associate professor of pathology, microbiology, and immunology at New York Medical College, explains that people get infected through aerosolized, contaminated water droplets that they inhale. Although home systems can harbor Legionella, outbreaks often originate in commercial-type buildings.
Symptoms and Treatment
Symptoms of Legionnaires’ disease often include cough, shortness of breath, fever, muscle aches, and headaches. In some cases, diarrhea, nausea, and confusion may occur. Symptoms typically appear 2 to 14 days after exposure. The disease often requires antibiotic treatment.
While the mortality rate is not high in healthy individuals, older adults, smokers, and those with compromised immune systems face greater risks.
Preventive Measures from the CDC
The CDC provides several strategies to prevent the spread of Legionnaires’ disease:
- Maintain building water systems through comprehensive management programs to curtail the growth of Legionella bacteria.
- Regularly clean, monitor, and disinfect cooling towers to control bacterial proliferation.
- Prevent stagnant water by ensuring proper water flow and flushing infrequently used pipes.
- Keep water temperatures and disinfectant levels within optimal ranges to inhibit bacterial growth. Legionella proliferates in warm water between 77°F and 113°F.
For those exposed and experiencing symptoms, seeking immediate medical care is crucial. Early diagnosis and treatment with antibiotics can mitigate the risk of severe illness. Individuals with risk factors and particularly older adults should seek prompt medical attention.