Le·gion·naires' disease (l  j -nârz )n. An acute, sometimes fatal respiratory disease caused by a bacterium of the genus Legionella, especially L. pneumophila, and characterized by severe pneumonia, headache, and a dry cough. [So called because it was first recognized when an outbreak occurred during an American Legion Convention in Philadelphia in 1976.] |
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| Noun | 1. | Legionnaires' disease - acute (sometimes fatal) lobar pneumonia caused by bacteria of a kind first recognized after an outbreak of the disease at an American Legion convention in Philadelphia in 1976; characterized by fever and muscle and chest pain and headache and chills and a dry cough lobar pneumonia - pneumonia affecting one or more lobes of the lung; commonly due to streptococcal infection |
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