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Pneumonia is an infection that causes inflammation in one or both lungs. The pulmonary alveoli fill with fluid or pus making it difficult to breathe. [1] Pneumonia can be caused by bacteria, viruses, fungi or parasites. [1] Viruses are the most common cause of pneumonia in children, while in adults bacteria are a more common cause. [2]
For most infections, the immune response of the body is enough to control and apprehend the infection within a couple days, but if the tissue and the cells can't fight off the infection, the creation of pus will begin to form in the lungs which then hardens into lung abscess or suppurative pneumonitis. [6]
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 ] The normal flora of the upper airway give protection by competing with pathogens for nutrients.
But it was “secondary” to the parainfluenza — or viral lung infection — the coroner’s report found. United States Air Force Academy Cadet Avery Koonce was found unconscious in her dorm room.
This triggers production of interferons, immune cytokines, and chemokines and activation of signaling pathways to respond to viral infection. [10] [15] Monocytes respond to infection by using phagocytosis to consume virus particles. [26] IgM antibodies to the viral surface glycoproteins are created to bind to and disable virus particles. During ...
Respiratory tract infections (RTIs) are infectious diseases involving the lower or upper respiratory tract. [1] An infection of this type usually is further classified as an upper respiratory tract infection (URI or URTI) or a lower respiratory tract infection (LRI or LRTI). Lower respiratory infections, such as pneumonia, tend to be far more ...
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