TABLE 4.

Phenotypic/genotypic isolate discrimination summary

Test	No. of isolates resistant or susceptible toa:
	Imipenem		Meropenem		Doripenem
	Resistant	Susceptible	Resistant	Susceptible	Resistant	Susceptible
Total (MIC)	98	102	100	100	101	99
PCR ESI/MS
Positive	93	18*	93	18*	94	17*
Negative	5**	84	7**	82	7**	82
MB
Positive	86	8*	86	8*	87	7*
Negative	12**	94	14**	92	14**	92

^a*, Overtreatment; **, undertreatment; no asterisk, appropriate treatment.