Learn about ventilator associated pneumonia (VAP) British Journal of Nursing Does oral care with chlorhexidine reduce ventilator associated pneumonia in mechanically ventilated adults? British Journal of Nursing 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 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 PatEdu.com : Ventilator Associated Pneumonia VAP