DNA Testing Used to Track Source of Deadly Legionnaires' Outbreak in Harlem

Investigating the Harlem Legionnaires' Outbreak

• 🦠 Legionnaires' disease outbreak in Harlem has resulted in five deaths and over a hundred infections.
• 🔬 A lawsuit has been announced by attorneys in connection with the outbreak.

Inside the Health Department Lab

• 🧪 A team of two dozen scientists is working around the clock at the Department of Health Lab in Kips Bay.
• 💧 They are testing water samples from cooling towers for Legionella bacteria.
• ⏱️ The process involves multiple testing methods, including culturing, which can take up to 10 days.

DNA Sequencing for Source Identification

• 🧬 DNA is extracted from bacteria found in patient cultures and cooling tower samples.
• 💻 This DNA is then loaded into a genome sequencer, a process that runs for up to 40 hours to determine the genetic code.
• 📊 The generated data is analyzed to identify potential matches and clusters, aiming to pinpoint the exact cooling tower responsible for sickening patients.

Public Health Surveillance Efforts

• 🔍 This detective work is part of ongoing public health efforts that include surveillance for foodborne outbreaks, ticks, and mosquitoes.
• ⚠️ While the Legionnaires' investigation is prioritized, other public health work continues concurrently.
• ⏳ Researchers emphasize that science cannot be rushed, and it still takes a couple of weeks to identify exact matches, with no definitive link yet established.