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A Legionella pneumophila bacterium (green) caught by a Vermamoeba vermiformis amoeba (orange) In nature, Legionella bacteria live inside tiny organisms, like amoebae (examples: Acanthamoeba spp., Naegleria spp., Vermamoeba spp., or other protozoa such as Tetrahymena pyriformis [34]). These amoebae are found in water and soil.
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.
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.
A legionellosis is any disease caused by Legionella, including Legionnaires' disease (a pneumonia) and Pontiac fever (a related upper respiratory tract infection), [10] but Legionnaires' disease is the most common, so mentions of legionellosis often refer to Legionnaires' disease. The bacterium is found naturally in fresh water. [4]
Legionella sp. under ultraviolet illumination Scientific classification; Domain: Bacteria: Phylum: Pseudomonadota: Class: Gammaproteobacteria: Order: Legionellales: Families and genera Legionellaceae Legionella Coxiellaceae Aquicella Coxiella Diplorickettsia Rickettsiella "Ca. Berkiella" [1] "Ca. Fiscibacter" [1] "Ca.
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 ...
Legionnaires’ disease is a type of pneumonia caused by Legionella bacteria. The bacteria can grow in any area where water sits for a long time, according to Dr. Andrew Handel, a pediatric ...
Legionella drancourtii is a Gram-negative bacterium from the genus Legionella which occurs in nature as a strictly intracellular parasite of free-living amoebae. [3] [4] It is named after Michel Drancourt. [5]