What is Legionnaires disease also known as?
Legionella bacteria can cause a serious type of pneumonia (lung infection) called Legionnaires’ disease. Legionella bacteria can also cause a less serious illness called Pontiac fever.
What is Legionnaires disease named after?
An outbreak of this disease in Philadelphia in 1976, largely among people attending a state convention of the American Legion, led to the name “Legionnaires’ disease.” Subsequently, the bacterium causing the illness was named Legionella pneumophila and the name of the illness was changed to Legionellosis.
What is the difference between Legionella and Legionellosis?
Legionellosis includes two diseases, Legionnaires’ disease and Pontiac fever, caused by exposure to the Legionella bacteria, Legionella pneumophila. Legionnaires’ disease causes pneumonia and was named after a deadly outbreak of pneumonia in 1976 among people attending a convention of the American Legion.
Is Legionellosis a virus?
Overview. Legionnaires’ disease is a severe form of pneumonia — lung inflammation usually caused by infection. It’s caused by a bacterium known as legionella. Most people catch Legionnaires’ disease by inhaling the bacteria from water or soil.
What type of microorganism is Legionella?
Legionella is a genus of pathogenic Gram-negative bacteria that includes the species L. pneumophila, causing legionellosis (all illnesses caused by Legionella) including a pneumonia-type illness called Legionnaires’ disease and a mild flu-like illness called Pontiac fever.
Why is it called Pontiac fever?
Pontiac fever was named for Pontiac, Michigan, where the first case was recognized. In 1968, several workers at the county’s department of health came down with a fever and mild flu symptoms, but not pneumonia.
Is Legionella a protozoa?
The discovery that L. pneumophila is ubiquitous in aquatic environments and exists as an intracellular parasite of protozoa It is only a little more than 30 years since Legionella pneumophila was recognized as a human pathogen and the cause of a severe pneumonia known as Legionnaires’ disease. The discovery that L.
How many types of Legionella are there?
Legionella pneumoph…Legionella longbeach…Legionella erythraCandidatus Legionella jeonii
Legionella/Lower classifications
What is the difference between Pontiac fever and Legionnaires disease?
Legionnaires’ disease accounts for nearly all cases of legionellosis reported in the United States. Pontiac fever is milder than Legionnaires’ disease and presents as an influenzalike illness, with fever, headache, and muscle aches, but no signs of pneumonia.
Why is brucellosis in humans called undulant fever?
Undulant fever: An infectious disease due to the bacteria Brucella that characteristically causes rising and falling fevers, sweats, malaise, weakness, anorexia, headache, myalgia (muscle pain) and back pain. The disease is called undulant fever because the fever is typically undulant, rising and falling like a wave.
Is Legionnaire capitalized?
In American texts, the L is usually capitalized in the name Legionnaires’ disease. However, lower case is often used in Canada and Britain. Note the apostrophe at the end of Legionnaires’. The first recognized cases of Legionnaires’ disease occurred in Philadelphia.
What causes Legionnaires disease?
You can get Legionnaires’ disease if you breathe in tiny droplets of water containing bacteria that causes the infection. It’s usually caught in places like hotels, hospitals or offices where the bacteria have got into the water supply. It’s less common to catch it at home.
How is legionellosis diagnosed?
The most commonly used laboratory test for diagnosis of Legionnaires’ disease is the urinary antigen test (UAT), which detects a molecule of the Legionella bacterium in urine. If the patient has pneumonia and the test is positive, then you should consider the patient to have Legionnaires’ disease.
Is Legionella A parasite?
Alveolar macrophages, which are the primary defense against bacterial infection of the lungs, engulf the bacteria; however, Legionella is a facultative intracellular parasite and multiplies freely in macrophages (Fig. 40-3).