Ventilator associated pneumonia: A lung infection that can occur in people who are on mechanical ventilation, A Randomized Trial of Diagnostic Techniques for Ventilator Associated Pneumonia New England Journal of Medicine Relative proportions of common causes of ventilator associated Download Table Life in icu follow for more clinical tips Ventilator Associated Pneumonia (VAP) Definition: Pneumonia that develops 4872 hours after endotracheal intubation and mechanical ventilation. Common Causes Gram negative bacilli