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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 ]
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 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 caused by inhaling water droplets contaminated with the Legionella bacteria. The bacteria can grow in water droplets from showers, hot tubs, faucets, cooling towers ...
The legionella bacteria responsible for the disease lives and multiplies in water areas like hot tubs, air conditioners, mist sprayers in grocery store produce departments, and water systems.
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 ...
People are typically exposed to the bacteria when they inhale tiny droplets of water contaminated with legionella from hot tubs, swimming pools or large-scale air conditioning systems like those ...
Pontiac fever is an acute, nonfatal respiratory disease caused by various species of Gram-negative bacteria in the genus Legionella. It causes a mild upper respiratory infection that resembles acute influenza. Pontiac fever resolves spontaneously and often goes undiagnosed.
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