5Vincent J L,Bihar D J,Suter P M.The prevalence of nosocomial infection is in intensive care units in Europe:Results of the Europeoan prevalence of infection in intersive care (EPIC) study[J].J A M A,1995,274(8):639.
6Ferrer R, Artigas A. Clinical review: non-antibiotic strategies for preventing ventilator-associated pneumonia. Crit Care, 2002, 6(1):45
7Flournoy D J, Reinert R L, Bell-Dixon C, et al. Increasing antimicrobial resistance in gram-negative bacilli isolated from patients in intensive care units. Am J Infect Control, 2000, 28(3):244