[Determinative factors in nosocomial pneumonia in patients with mechanical ventilation in the respiratory care unit].

We studied risk factors for nosocomial pneumonia in 192 intubated patients. Nosocomial pneumonia was diagnosed in 50 (26%) of the 192 patients. The patients receiving mechanical ventilation and the ventilators were colonised with Gram negative bacteria, mainly Actinetobacter and Pseudomonas. The duration of mechanical ventilation and the bacterail colonization of ventilators were associated with the development of pneumonia.