TABLE 2.

Rapid identification of carbapenemases by NG-test Carba 5, RESIST-5 O.O.K.N.V., and IMP K-SeT.

Strains	β -lactamase	No. of positive tests/total no. of strains			Sensitivity [% (95% CI)]	Specificity [% (95% CI)]
		NG-test Carba 5	RESIST-5 O.O.K.N.V.	IMP K-SeT
Clinical strains
	KPC-2	70/70	70/70	0/70	100 (93.5–100)	100 (96.0–100)
	NDM	60/60			100 (92.5–100)	100 (96.3–100)
			59/60	0/60	98.3 (89.7–100)	100 (96.3–100)
	NDM-1	35/35	34/35
	NDM-5	23/23	23/23
	NDM-7	1/1	1/1
	NDM-9	1/1	1/1
	IMP	6/6	0/6	6/6	100 (51.7–100)	100 (97.4–100)
	IMP-4	5/5	0/5	5/5
	IMP-6	1/1	0/1	1/1
	OXA-48-like	24/24	24/24	0/24	100 (82.8–100)	100 (97.1–100)
	OXA-232	20/20	20/20
	OXA-48	2/2	2/2
	OXA-181	2/2	2/2
	VIM-1	1/1	1/1	0/1	100 (5.5–100)	100 (97.5–100)
	Multiple carbapenemases	11/11	11/11	2/11	100 (67.9–100)	100 (97.3–100)
	KPC-2 + NDM-1	7/7	7/7
	KPC-2 NDM-5	1/1	1/1
	NDM-5 OXA-48	1/1	1/1
	NDM-1 IMP-4	1/1	1/1
	NDM-1 IMP-6	1/1	1/1
	Carbapenemase-negative	0/14	0/14	0/14
	Total	172/186			100 (97.3–100)	100 (73.2–100)
			165/186	6/186	99.4 (96.2–100)	100 (80.0–100)
Reference strains
	KPC-2	14/14	14/14	0/14
	NDM-1	6/6	6/6	0/6
	IMP-1/70	1/1	0/1	1/1
	VIM-1	2/2	2/2	0/2
	OXA-48-like	3/3	3/3	0/3
	OXA-48	2/2	2/2
	OXA-181	1/1	1/1
	ESBL	0/3	0/3	0/3
	Total	26/29			100 (84.0–100)	100 (31.0–100)
			25/29	1/1	100 (83.4–100)	100 (39.6–100)