Bacteria responsible for chronic gum disease have been found living inside calcified human aortic valves, a discovery that reframes valve hardening as an active, infection-driven process rather than a passive consequence of aging.

New York City is experiencing a Legionnaires' disease outbreak with five fatalities reported. Health officials confirmed over sixty-six individuals have fallen ill during the past month. Legionnaires' disease usually begins with fever,

Learn how Legionella bacteria invade the lungs and cause pneumonia, respiratory failure, and other life-threatening complications.

A new study reveals that the bacteria behind periodontal gum disease can harden heart valves by triggering a specific inflammatory pathway, linking oral hygiene to preventing serious heart disease.

Thirty-four cooling towers at 33 buildings on the Upper East Side tested positive for live Legionella bacteria, the New York City Health Department announced Tuesday.