Nosocomial pneumonia due to Klebsiella pneumoniae

Nosocomial pneumonia due to *Klebsiella pneumoniae* is a hospital-acquired lower respiratory tract infection caused by the Gram-negative, encapsulated bacterium *Klebsiella pneumoniae*, typically developing 48 hours or more following admission It predominantly affects hospitalized individuals in intensive care units, mechanically ventilated patients, the elderly, and immunocompromised hosts with chronic underlying conditions Clinically, it manifests with fever, productive cough with purulent spu...

Nosocomial pneumonia due to *Klebsiella pneumoniae* is a hospital-acquired lower respiratory tract infection caused by the Gram-negative, encapsulated bacterium *Klebsiella pneumoniae*, typically developing 48 hours or more following admission Pathophysiologically, the organism colonizes the oropharynx or medical devices and is microaspirated into the lower respiratory tract, where virulence determinants—such as a thick polysaccharide capsule and endotoxins—promote parenchymal inflammation, exte...

It predominantly affects hospitalized individuals in intensive care units, mechanically ventilated patients, the elderly, and immunocompromised hosts with chronic underlying conditions

Pathophysiologically, the organism colonizes the oropharynx or medical devices and is microaspirated into the lower respiratory tract, where virulence determinants—such as a thick polysaccharide capsule and endotoxins—promote parenchymal inflammation, extensive tissue necrosis, and purulent alveolar exudation

Pathophysiologically, the organism colonizes the oropharynx or medical devices and is microaspirated into the lower respiratory tract, where virulence determinants—such as a thick polysaccharide capsule and endotoxins—promote parenchymal inflammation, extensive tissue necrosis, and purulent alveolar exudation

Clinically, it manifests with fever, productive cough with purulent sputum, dyspnea, leukocytosis, and focal pulmonary infiltrates on imaging, frequently complicated by cavitation, abscess formation, or multidrug resistance