What are all of pneumonia?
“Classic”, or bacterial, pneumonia was scientifically described in the XIX century, and about the same time was allocated first known pathogens — pneumococcus. With such a pneumonia — it is also called “typical pneumonia” infection in the lower respiratory tract provokes inflammation and accumulation of fluid in the alveoli, exudate is formed, and there is respiratory failure.
Closer to the mid-twentieth century described SARS, which can provoke many pathogens — chlamydia, Mycoplasma, Legionella and viruses. It does not give characteristic for the “classic” clinical picture may be accompanied by fever, wheezing, sputum with blood. In her may prevail over the common signs of intoxication, and dry cough. On radiographs, as a rule, see only indistinct infiltrate.
Among physicians has started a debate that is still ongoing, on the question of whether a virus cause pneumonia. The classical mechanism of pneumonia is associated with certain properties of bacteria, with the emissions of substances with the immune response that they provoke. Against this background, the virus either does not cause pneumonia, or if you are calling atypical.
Pneumonia of this type can be called an interstitial, since the liquid is not formed in the alveoli, and in the interstices, that is, in the connective tissue space between them. This promotes the formation of non-specific pattern when the alveoli, “all is well”. This inflammation can be seen only with CT scan — there can be seen the so-called “frosted glass” or some other interstitial pattern.