Among the factors contributing to contracting<unk>  are mechanical ventilation (ventilator-associated<unk> , old age, decreased filtration of inspired air, intrinsic respiratory, neurologic, or other disease states that result in respiratory tract obstruction, trauma, (abdominal) surgery, medications, diminished lung volumes, or decreased clearance of secretions may diminish the defenses of the lung. Also, poor hand-washing and inadequate disinfection of respiratory devices cause cross-infection and are important factors.
Hospital-acquired pneumonia
Community-acquired pneumonia
Ventilator-associated pneumonia
Idiopathic pneumonia syndrome
Pneumococcal pneumonia
Bacterial pneumonia
Hantavirus pulmonary syndrome
Aspiration pneumonia