Legionnaires' Disease

**Definition:** An acute, sometimes fatal, pneumonia-like bacterial infection characterized by high fever, malaise, muscle aches, respiratory disorders and headache. It is named for an outbreak at the 1976 Philadelphia convention of the American Legion.

**Tree numbers:** - C01.150.252.400.500.501 - C01.748.382.380 - C08.730.382.380

**Synonyms:** - Legionnaire Disease - Infections, Legionella pneumophila - Legionella pneumophila Infections