Ventilator associated pneumonia: pathobiological heterogeneity and diagnostic challenges Nature Communications A retrospective evaluation of multiple definitions for ventilator associated pneumonia (VAP) diagnosis in an Australian regional intensive care unit ScienceDirect Today's Topic: Ventilator Associated Pneumonia (VAP) VAP is a type of pneumonia that develops 48 hours or more after intubation and mechanical ventilation. Why It Happens: Bacteria enter the Preventing Ventilator Associated Pneumonia ( VAP ) : * Head of the bed elevation : maintain the head of the bed elevated ( 30 40 ) * Daily sedation interruptions and assessment What is VAP? A breakdown of the fatal infection OralKleen