Objective To evaluate the clinical efficacy and safety of tigecycline in critically ill patients with ventilatorassociated pneumonia( VAP). Methods A prospective study was conducted based on critically ill patients with VAP in Intensive Care Unit of Qilu Hospital of Shandong University during Jan 1,2011 and May 31,2013. All patients accepted intravenous infusion of tigecycline with a first dose of 100 mg and then 50 mg every 12 h. The course was directed by medical advice. The clinical and bacterial efficac...