Ventilator associated pneumonia VAP VAP Bundle VAP Causes CAP (Community Acquired Pneumonia), HAP (Hospital Acquired Pneumonia), VAP (Ventilator Associated Pneumonia), and HCAP (Health Care Associated Pneumonia) are types of pneumonia differing by where sumaya Gholami What is the definition of hospitalacquired pneumonia (HAP) and how does it differ from ventilatorassociated pneumonia (VAP)? Ventilator Associated Pneumonia (VAP) VAP is a subtype of hospital acquired pneumonia or Nosocomial pneumonia which occur in people who are receiving mechanical ventilation. It develops more than 48 hours after tracheal Full article: The pathogenesis of ventilator associated pneumonia: old and new mechanisms