. 2011 Dec 20;2(6):e00280-11. doi: 10.1128/mBio.00280-11

TABLE 1 .

Microbiological features and dissemination potential of four carbapenemases

Carbapenemase	Class^a	Predominant species	Imipenem MIC	Location of gene^b	Dissemination potential/mode	References
SME-1/2/3	A	S. marcescens	High	Ch	Limited	1, 3, 15
KPC-2/3	A	K. pneumoniae	High	Pl	High/clonal (ST-258)	8–11
OXA-48	D	Variable	Low	Pl	High/plasmid	16, 17
NDM-1	B	Variable	Variable	Pl, Ch	High/combined	9, 20

^{^a}

According to Ambler’s structural classification.

^{^b}

Ch, chromosome; Pl, plasmid.