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Legionnaires' disease is a form of atypical pneumonia caused by any species of Legionella bacteria, [3] quite often Legionella pneumophila. Signs and symptoms include cough, shortness of breath, high fever, muscle pains, and headaches. [2] Nausea, vomiting, and diarrhea may also occur. [1] This often begins 2–10 days after exposure. [2]
Legionella pneumophila, the primary causative agent for Legionnaire's disease, is an aerobic, pleomorphic, flagellated, non-spore-forming, Gram-negative bacterium. [ 1 ] [ 2 ] L. pneumophila is a intracellular parasite that preferentially infects soil amoebae and freshwater protozoa for replication.
Legionella pneumophila is the most common cause, but sometimes other species of Legionella bacteria also cause Legionnaires' disease. [ 15 ] [ 16 ] The terms "Philadelphia fever" and "Legion fever" appear to have been used at the time of the outbreak and for shortly thereafter, [ 17 ] although at least one 2008 source which covers disease in a ...
Legionella is a genus of gram-negative bacteria that can be seen using a silver stain or grown in a special media that contains cysteine, an amino acid.It is known to cause legionellosis [3] (all illnesses caused by Legionella) including a pneumonia-type illness called Legionnaires' disease and a mild flu-like illness called Pontiac fever. [3]
Legionnaires Disease is an acute type of pneumonia that is caused by the inhalation of aerosolized water containing the Legionella bacteria. [3] Forty-two Legionella species have been classified to date, and these bacteria can grow in areas where there is warm water, such as cooling towers. [4] [5] Legionella pneumophila bacteria
56 confirmed cases, with a further 36 suspected cases, bringing the total number of people affected to 92. Four people are known to have died from the outbreak. [30] 2012: Chicago, Illinois, United States: JW Marriott Hotel: Decorative Lobby Fountain: 10: 3: 30%: 8 confirmed cases with people who stayed at the JW Marriott Chicago during July ...
They comprise two families, typified by Legionella and Coxiella, both of which include notable pathogens. For example, Q fever is caused by Coxiella burnetii and Legionella pneumophila causes Legionnaires' disease [3] [4] and Pontiac fever. [5] [6] [7]
Atypical bacteria causing pneumonia are Coxiella burnetii, Chlamydophila pneumoniae (), Mycoplasma pneumoniae (), and Legionella pneumophila.. The term "atypical" does not relate to how commonly these organisms cause pneumonia, how well it responds to common antibiotics or how typical the symptoms are; it refers instead to the fact that these organisms have atypical or absent cell wall ...