What is Legionnaire's disease?
A person with Legionnaire's disease has pneumonia, caused by an infection with the bacteria, Legionella pneumophila. The infection causes inflammation of the lung, which causes fluid to collect in the lung. The fluid can prevent oxygen from entering the bloodstream.

What are the symptoms of Legionnaire's disease?
Symptoms of Legionnaire's disease include chest pain, breathing difficulty, cough, coughing blood, muscle aches, headache, weakness or fatigue, high fever, vomiting, and diarrhea. Symptoms of serious Legionnaire's disease include confusion and seizures.

How does the doctor treat Legionnaire's disease?
Treatment for Legionnaire's disease includes rest, bronchodilator medications, antibiotics, cough medicines, and acetaminophen or nonsteroidal anti-inflammatory medications for pain and fever control.