AHA Coding Clinic® for ICD-9 - 1997 Fourth Quarter

Legionnaires' Disease

Legionnaires' disease acquired its name in 1976 when an outbreak of pneumonia occurred among persons attending a convention of the American Legion in Philadelphia. Later, the bacterium causing the illness was named Legionella. There are now more than 30 species of Legionella, and at least 19 species have been implicated as agents of pneumonia in man. Legionnaires' disease is a form of pneumonia that is almost always caused by inhalation of aerosols that come from a water source contaminated with the bacteria (e.g. air conditioning cooling towers, whirlpool spas, showers). The symptoms are usually fever, chills, and a...

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