: A Potentially Severe Infection.

infections remain one of the most common etiologies of community-acquired pneumonia (CAP). The clinical presentation and manifestations vary widely and can affect all organs of the body. Diagnosis is challenging because there are no constant findings in physical exams or laboratory or radiological assessments that indicate pneumonia, and specific diagnostic tools are not readily available. Extrapulmonary manifestations and severe pulmonary manifestations can lead to long-term sequelae. The increasing emergence of that is resistant to macrolides in some areas of the world and increased world travel could add to the difficulty of controlling and treating infections. We present a concise and up-to-date review of the current knowledge of pneumonia.