TABLE 1.

Performance of commercial systems: inferring carbapenemase production in carbapenem-resistant Enterobacteriaceae

System and panel type	Carbapenemase warning given	No. of isolates with carbapenem resistance mechanisma		Sensitivity (%)	Specificity (%)
		Carbapenemase (n = 39)	Noncarbapenemase (n = 16)
Phoenix NMIC/id-76	Yes	39	16	100	0
	No	0	0
MicroScan NM36	Yes	33	15	85	6
	No	6	1
MicroScan NBC39	Yes	32	13	82	19
	No	7	3
Vitek 2 AST-N054	Yes	29	10	74	38
	No	10	6

^aMechanisms were defined by PCR and sequencing.