TABLE 2.

Susceptibility rates of 30 blaKPC-possessing E. coli isolates according to the 2009 and 2010 CLSI breakpoints

Breakpoint yr% susceptiblea
Broth microdilution methodEtest method
IPMMERDORETPIPMMERDORETP
2009777717b43478017b47
2010340500343230
  • a IPM, imipenem; MER, meropenem; DOR, doripenem; ETP, ertapenem.

  • b Values calculated based on the 2009 FDA-recommended breakpoint for doripenem.