3National Committee for Clinical Laboratory Standards. Performance standards for antimicrobial susceptibility testing [S]. M100-S18. CLSI,2008:54-84.
4Sorberg M, Farra A, Ransio A, et al. Long-term antibiotic resist ance surveillance of Gram negative pathogens suggests that tern poral trends can be used as a resistance warning system[J]. Scand J Infect Dis,2002,34(5):372- 378.
5Hirsch EB, Tam VH. Detection and treatment options for Klebsiella pneumoniae carbapenemases(KPCs) :an emerging cause of multidrug-resistant infection[J]. J Antimicrob Chemother,2010,65(6) :1119-1125.
6Clinical and Laboratory Standards Institute. Performance standards for antimicrobial Susceptibility testing;twentieth informational supplement[S].USA:CLSI,2010.