Legionnaires' disease is a serious type of pneumonia caused by Legionella bacteria. Certain people are at increased risk for this infection, but it's treatable with antibiotics. People can get Legionnaires' disease by breathing in mist containing Legionella bacteria.

2021年5月24日 · The bacterium Legionella pneumophila is responsible for most cases of Legionnaires' disease. Outdoors, legionella bacteria survive in soil and water, but rarely cause infections. However, legionella bacteria can multiply in water systems made by humans, such as air conditioners.

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 …

Legionella bacteria can cause a severe type of pneumonia (Legionnaires' disease) and mild flu-like illness (Pontiac fever). Homepage for CDC's information on Legionella infections, including Legionnaires' disease.

2022年9月6日 · The most common cause of illness is the freshwater species L. pneumophila, which is found in natural aquatic environments worldwide. However, artificial water systems which provide environments conducive to the growth and dissemination of Legionella represent the most likely sources of disease.

Legionella bacteria causes Legionnaires’ disease. While there are at least 60 species of Legionella, Legionnaires’ disease is most often caused by Legionella pneumophila. You get Legionnaires’ disease when Legionella infects your lungs.

2024年1月31日 · It defines this bacterial disease and explains how the bacteria spread. The fact sheet describes symptoms and who's at increased risk for getting Legionnaires' disease. It also discusses how healthcare providers diagnose, test for, and treat this type of pneumonia.

Legionella pneumophila is a facultative intracellular pathogen. Cell-mediated immunity plays an important host defense against Legionella pneumophila infection. After Legionella reach the lungs through aspiration or direct inhalation, it attaches to the respiratory mucosa.

2010年5月21日 · Legionella pneumophila is a gram-negative bacillus that most often causes pneumonia with extrapulmonary features. Diagnosis requires specific growth media, serologic or urine antigen testing, or polymerase chain reaction analysis.

Legionella generally infects the lung, causing pneumonia, which is often very severe. Symptoms may include: diarrhoea. People of any age may be infected, but the disease is more common in middle aged and older people and people whose immune system is weak. Men are affected more frequently than women. Risk of infection is increased by: