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Health and Medicine - Why Is Legionnaire's Disease Known By That Name?

Why is Legionnaire's disease known by that name?

Legionnaire's disease was first identified in 1976 when a sudden, severe outbreak of pneumonia took place at a hotel in Philadelphia, Pennsylvania, where delegates to an American Legion convention were staying. The cause of the outbreak was eventually identified as a previously unknown bacterium, given the name Legionnella pneumophilia. This bacterium probably was transmitted through the air. Scientists have determined also that Legionnella can spread through air-conditioning systems. It also thrives in soil and excavation sites.

Usually Legionnaire's disease is contracted in late summer or early fall and its severity ranges from mild to life-threatening. The mortality rate due to Legionnaire's disease is as high as 15 percent. Symptoms include diarrhea, loss of appetite, malaise (bodily discomfort), headache, generalized weakness,...

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