PDF] The Clinical Diagnosis of Ventilator Associated Pneumonia Semantic Scholar VAP, VAC, IVAC and Ventilator Associated Events: The Need for Objectivity for Surveillance Ventilator Associated Pneumonia (VAP) is a serious lung infection that occurs in patients on mechanical ventilation for over 48 hours. It is often caused by bacteria entering the lungs through the ventilator, leading PatEdu.com : Ventilator Associated Pneumonia VAP Ventilator associated Pneumonia: They've Zapped VAP RT