Pon·ti·ac fever 'pänt-ē-.ak- n an illness caused by a bacterium of the genus Legionella (L. pneumophila) that is a less severe form of Legionnaires' disease in which pneumonia does not develop
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an influenzalike disease caused by infection with any of various species of Legionella; characteristics include fever, chills, cough, muscle pain, headache, chest pain, and pleurisy.Medical dictionary. 2011.