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It is the most common bacterial pneumonia found in adults, the most common type of community-acquired pneumonia, and one of the common types of pneumococcal infection. The estimated number of Americans with pneumococcal pneumonia is 900,000 annually, with almost 400,000 cases hospitalized and fatalities accounting for 5-7% of these cases.
Necrotizing pneumonia (NP), also known as cavitary pneumonia or cavitatory necrosis, is a rare but severe complication of lung parenchymal infection. [ 1 ] [ 2 ] [ 3 ] In necrotizing pneumonia, there is a substantial liquefaction following death of the lung tissue, which may lead to gangrene formation in the lung.
People may become infected with pneumonia in a hospital; this is defined as pneumonia not present at the time of admission (symptoms must start at least 48 hours after admission). [ 85 ] [ 84 ] It is likely to involve hospital-acquired infections , with higher risk of multidrug-resistant pathogens.
More than 41,000 people in the U.S. died of pneumonia in 2022, according to the CDC. Pneumonia can be a deadly complication of COVID, the flu, and RSV: What to know about pneumococcal vaccination ...
If unresolved, continued inflammation can result in irreparable damage such as pulmonary fibrosis. [4] Pneumonitis is distinguished from pneumonia on the basis of causation as well as its manifestation. Pneumonia can be described as pneumonitis combined with consolidation and exudation of lung tissue due to infection with microorganisms. [5]
Parasitic pneumonia is a type of pneumonia caused by parasites. Pneumonia is an inflammatory condition of the lungs, most commonly caused by bacteria or viruses. [ 1 ] Parasites are an uncommon cause of pneumonia, usually affecting immunocompromised individuals or those in underdeveloped countries. [ 2 ]
Pneumococcal infection is an infection caused by the bacterium Streptococcus pneumoniae. [ 1 ] S. pneumoniae is a common member of the bacterial flora colonizing the nose and throat of 5–10% of healthy adults and 20–40% of healthy children. [ 2 ]
Streptococcus pneumoniae is the most common bacterial cause of pneumonia in all age groups except newborn infants. Streptococcus pneumoniae is a Gram-positive bacterium that often lives in the throat of people who do not have pneumonia. Other important Gram-positive causes of pneumonia are Staphylococcus aureus and Bacillus anthracis.