Nosocomial pneumonia due to Acinetobacter baumannii-calcoaceticus complex

Nosocomial pneumonia due to *Acinetobacter baumannii-calcoaceticus* complex is an acute lower respiratory tract infection—encompassing hospital-acquired bacterial pneumonia (HABP) and ventilator-associated bacterial pneumonia (VABP)—acquired within healthcare settings It predominantly affects hospitalized individuals, particularly critically ill patients in intensive care units undergoing invasive mechanical ventilation or prolonged hospital stays

Nosocomial pneumonia due to *Acinetobacter baumannii-calcoaceticus* complex is an acute lower respiratory tract infection—encompassing hospital-acquired bacterial pneumonia (HABP) and ventilator-associated bacterial pneumonia (VABP)—acquired within healthcare settings

It predominantly affects hospitalized individuals, particularly critically ill patients in intensive care units undergoing invasive mechanical ventilation or prolonged hospital stays Clinically, it manifests with new or progressive radiographic pulmonary infiltrates, worsening hypoxemia, purulent tracheobronchial secretions, fever, and systemic signs of sepsis, with high disease severity frequently compounded by extensive multidrug resistance

It predominantly affects hospitalized individuals, particularly critically ill patients in intensive care units undergoing invasive mechanical ventilation or prolonged hospital stays

Pathophysiologically, opportunistic colonization and microaspiration of these aerobic, Gram-negative coccobacilli trigger profound pulmonary parenchymal inflammation, alveolar exudation, and tissue necrosis

Pathophysiologically, opportunistic colonization and microaspiration of these aerobic, Gram-negative coccobacilli trigger profound pulmonary parenchymal inflammation, alveolar exudation, and tissue necrosis

Clinically, it manifests with new or progressive radiographic pulmonary infiltrates, worsening hypoxemia, purulent tracheobronchial secretions, fever, and systemic signs of sepsis, with high disease severity frequently compounded by extensive multidrug resistance

Clinically, it manifests with new or progressive radiographic pulmonary infiltrates, worsening hypoxemia, purulent tracheobronchial secretions, fever, and systemic signs of sepsis, with high disease severity frequently compounded by extensive multidrug resistance