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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]
Pneumococcal pneumonia is a type of bacterial pneumonia that is caused by Streptococcus pneumoniae (pneumococcus). [1] 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 .
Pneumonia is a common illness, affecting approximately 450 million people a year, and occurring in all parts of the world. [18] It is a major cause of death among all age groups, resulting in 7% of the world's total death yearly.
People with a compromised immune system, such as those living with HIV, are also at higher risk of pneumococcal disease. [5] In HIV patients with access to treatment, the risk of invasive pneumoccal disease is 0.2–1% per year and has a fatality rate of 8%. [5] There is an association between pneumococcal pneumonia and influenza.
The following outline is provided as an overview of and topical guide to concepts related to infectious diseases in humans.. Infection – transmission, entry/invasion after evading/overcoming defense, establishment, and replication of disease-causing microscopic organisms (pathogens) inside a host organism, and the reaction of host tissues to them and to the toxins they produce.
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).
Pneumonia is a lung infection characterized by symptoms such as fever, chills, coughing, rapid or labored breathing, and chest pain. [28] For the elderly, those who contract pneumonia have also shown these lesser nonspecific symptoms, but also tend to show that they have tachypnea a few days before clinical certainty that they have contracted ...
Diseases such as emphysema and habits such as smoking result in more frequent and more severe bouts of pneumonia. In children, recurrent pneumonia may indicate cystic fibrosis or pulmonary sequestration. Immune problems - Immune-deficient patients, such as those with HIV/AIDS, are more likely to develop pneumonia.