Emergence of New Delhi Metallo-Beta-Lactamase (NDM) and Klebsiella pneumoniae Carbapenemase (KPC) Production by Escherichia coli and Klebsiella pneumoniae in Southern Vietnam and Appropriate Methods of Detection: A Cross-Sectional Study

Table 5

Combined disk test results in E. coli and K. pneumonia.

Combined disk test			Real-time PCR		TPR (%); 95%	SPC; (%)	PPV; (%)	NPV; (%)	Accuracy; (%)
	Species		Pos	Ne
NDM detection	E. coli; (n=50)	Pos	15	1	93.8	97.1	93.8	97.1	96.0
		Neg	1	33
	K. pneumoniae; (n=50)	Pos	19	0	90.5	100	100	93.6	96
		Neg	2	29
KPC detection	E. coli; (n=50)	Pos	2	2	66.7	95.7	50	97.8	94.0
		Neg	1	45
	K. pneumoniae; (n=50)	Pos	8	3	100	92.9	72.7	100	94
		Neg	0	39

Pos: positive, Neg: negative.