Optimising the duration of antibiotic therapy for ventilator associated pneumonia European Respiratory Society Ventilator associated pneumonia (VAP) is a common ICU infection in patients on mechanical ventilation, caused by bacteria like Klebsiella, Pseudomonas, and Staphylococcus aureus. Rising antibiotic resistance highlights the need for preventive Pathogenesis, Diagnosis and Therapeutic Strategies for Ventilator associated Pneumonia Journal of Pure and Applied Microbiology Pseudomonas aeruginosa ventilator associated pneumonia: improved outcomes with earlier follow up