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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. [2]
Pneumonia is a common respiratory infection, [2] affecting approximately 450 million people a year and occurring in all parts of the world. [3] It is a major cause of death among all age groups, resulting in 1.4 million deaths in 2010 (7% of the world's yearly total) and 3.0 million deaths in 2016 (the 4th leading cause of death in the world).
Chest radiographs (X-ray photographs) often show a pulmonary infection before physical signs of atypical pneumonia are observable at all. [5] This is occult pneumonia. In general, occult pneumonia is rather often present in patients with pneumonia and can also be caused by Streptococcus pneumoniae, as the decrease of occult pneumonia after ...
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.
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 ]
CURB-65, also known as the CURB criteria, is a clinical prediction rule that has been validated for predicting mortality in community-acquired pneumonia [1] and infection of any site. [2] The CURB-65 is based on the earlier CURB score [ 3 ] and is recommended by the British Thoracic Society for the assessment of severity of pneumonia. [ 4 ]
Pneumonia fills the lung's alveoli with fluid, hindering oxygenation. The alveolus on the left is normal, whereas the one on the right is full of fluid from pneumonia. Pneumonia frequently starts as an upper respiratory tract infection that moves into the lower respiratory tract. [55] It is a type of pneumonitis (lung inflammation). [56]
Of those case, viral pneumonia counts for about 200 million cases which includes about 100 million children and 100 million adults. [14] Viral pneumonia is more prevalent in the very young, less than 5 years old, and in the very old, more than 75 years old. [14] Developing countries have a higher rate of incidence when it comes to viral pneumonia.