Pneumonia Legionnaire's Anatomy
To better understand Legionnaire's disease, it helps to understand the anatomy of the lungs.
Inside the chest, the windpipe, or trachea, divides into two smaller tubes: the right bronchus and the left bronchus. The right bronchus enters the right lung and the left bronchus enters the left lung. The right bronchus and left bronchus branch into smaller and smaller tubes.
The smallest tubes, called bronchioles, end in tiny air sacs, called alveoli. Blood flows very close to the walls of the alveoli. Oxygen and carbon dioxide pass between the air and the bloodstream through the wall of the alveoli.
- Campins M, Ferrer A, Callis L, Pelaz C, Cortes PJ, Pinart N, Vaque J. Nosocomial Legionnaire's disease in a children's hospital. Pediatr Infect Dis J. 2000 Mar;19(3):228-34. 
- Lane G, Ferrari A, Dreher HM. Legionnaire's disease: a current update. Medsurg Nurs. 2004 Dec;13(6):409-14. 
- Tercelj-Zorman M, Seljak M, Stare J, Mencinger J, Rakovec J, Rylander R, Strle F. A hospital outbreak of Legionella from a contaminated water supply. Arch Environ Health. 2004 Mar;59(3):156-9. 
- Waterer GW, Baselski VS, Wunderink RG. Legionella and community-acquired pneumonia: a review of current diagnostic tests from a clinician's viewpoint. Am J Med. 2001 Jan;110(1):41-8.