Table 2.

Performance of Carba 5 assay and Xpert Carba-R assay using isolates from the prospective analysis

Target carbapenemase	Number of isolates	Carba 5		Xpert Carba-R
		% sensitivity (95% CI)	% specificity (95% CI)	% sensitivity(95% CI)	% specificity (95% CI)
Class A
KPC	32	100 (89.11–100)	100 (78.20–100)	100 (89.11–100)	100 (78.20–100)
Class B
NDM	4	100 (39.76–100)	100 (91.78–100)	100 (39.76–100)	100 (91.78–100)
Class A + B
KPC + NDM	1	100 (2.50–100)	100 (92.29–100)	100 (2.50–100)	100 (92.29–100)
Overall	37	100 (90.51–100)	100 (69.15–100)	100 (90.51–100)	100 (69.15–100)
Non carbapenemase producers	10