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Many of the organisms causative of atypical pneumonia are unusual types of bacteria (Mycoplasma is a type of bacteria without a cell wall and Chlamydias are intracellular bacteria). As the conditions caused by the various agents have different courses and respond to different treatments, the identification of the specific causative pathogen is ...
The most common causes of CAP vary depending on a person's age, but they include Streptococcus pneumoniae, viruses, the atypical bacteria, and Haemophilus influenzae. Overall, Streptococcus pneumoniae is the most common cause of community-acquired pneumonia worldwide. Gram-negative bacteria cause CAP in certain at-risk populations. CAP is the ...
Atypical bacteria causing pneumonia are Coxiella burnetii, Chlamydophila pneumoniae (), Mycoplasma pneumoniae (), and Legionella pneumophila.. The term "atypical" does not relate to how commonly these organisms cause pneumonia, how well it responds to common antibiotics or how typical the symptoms are; it refers instead to the fact that these organisms have atypical or absent cell wall ...
Viral pneumonia presents more commonly with wheezing than bacterial pneumonia. [25] Pneumonia was historically divided into "typical" and "atypical" based on the belief that the presentation predicted the underlying cause. [29] However, evidence has not supported this distinction, therefore it is no longer emphasized. [29]
Nontuberculous mycobacteria (NTM), also known as environmental mycobacteria, atypical mycobacteria [1] and mycobacteria other than tuberculosis (MOTT), are mycobacteria which do not cause tuberculosis or leprosy/Hansen's disease. NTM can cause pulmonary diseases that resemble tuberculosis. [2]
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Community acquired pneumonia is one of the leading causes of hospitalization due to an infectious agent. [11] Streptococcus pneumoniae bacteria, a type of typical agent, cause about 50% of this form of pneumonia. [11] [12] Respiratory viruses and atypical bacteria are also responsible for causing many cases of community acquired pneumonia ...
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