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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]
Legionella spp. enter the lungs either by aspiration of contaminated water or inhalation of aerosolized contaminated water or soil. In the lung, the bacteria are consumed by macrophages , a type of white blood cell , inside of which the Legionella bacteria multiply, causing the death of the macrophage.
Large hotel with solar water heating system for spa and domestic hot water. A month before the deaths, local government authorities may have known about the problem, but were accused of not alerting the public to avoid disruption of the tourism industry. [29] 2012: Edinburgh, Scotland: South west of Edinburgh: Possibly cooling towers: 92: 4: 3%
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, 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.
According to the CDC, Legionella bacteria can cause a serious type of pneumonia, known as Legionnaires disease or Pontiac fever. Legionella bacteria is spread through the air when an individual ...
February 5 – A Proceedings of the National Academy of Sciences study on the causes of an outbreak of Legionnaires' disease in Flint in 2014 and 2015 finds that low chlorine levels were the cause. [74] Chlorine, which kills microbes responsible for the disease, also reacts with heavy metals like lead and iron.
Legionella bacteria exists naturally in bodies of fresh water but can be a threat to people when it grows and spreads in building water systems like cooling towers or water tanks, according to the ...