Diagnostic performance of the Xpert Carba-R assay for active surveillance of rectal carbapenemase-producing organisms in intensive care unit patients

Table 1 The detection limit of CRE culture stratified by carbapenemase genes

Carbapenemases	Strains	Disk diffusion (mm)			The lowest detection limit of CRE culture (CFU/plate)
Carbapenemases	Strains	Ertapenem	Imipenem	Meropenem	The lowest detection limit of CRE culture (CFU/plate)
Ambler class A carbapenemase
KPC	C. koseri 150	15	18	18	1
KPC	E. cloacae 207	7	19	15	10
KPC	K. oxytoca 211	18	22	23	1
KPC	K. pneumoniae 222	11	17	13	1
KPC	E. coli 223	15	17	20	1
MBL carbapenemase
NDM	C. freundii 148	18	20	19	100
NDM	E. coli 192	6	12	10	10
VIM	K. pneumoniae 225	18	19	19	10
IMP-1	E. asburiae 44	16	21	19	100
Ambler class D carbapenemase
OXA-48	E. coli 229	19	22	23	1 × 10⁴

ISSN: 2047-2994