Ventilator associated pneumonia: The central role of transcolonization ScienceDirect 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: Treatment & Prevention Study.com Ventilator Associated Pneumonia After Cardiac Arrest and Prevention Strategies: A Narrative Review Common Pathogens in HAP VAP PharmacyLibrary