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 VAP (Ventilator Associated Pneumonia) Explained Simply for Nurses Ventilator Associated Pneumonia (VAP) is a serious hospital acquired infection that develops 48 hours or more after mechanical ventilation. It significantly increases ICU stay VAP Bundle Ventilator Associated Pneumonia Ventilator Associated Pneumonia ( VAP) is a lung infection that occurs in patients who are on mechanical ventilation for more than 48 hours. A VAP bundle is a set of Ventilator associated pneumonia: A lung infection that can occur in people who are on mechanical ventilation,