Table 2.

Comparison of the sensitivities of Vitek 2 and MALDI-TOF MS in the identification of Gram positive bacteria to the species and genus levels

Organism (n)	Number (%) of isolates with Correct identification to the species level:			Number (%) of isolates with Correct identification to the genus level:
	Vitek 2	MALDI-TOF MS	P value	Vitek 2	MALDI-TOF MS	P value
Staph aureus (33)	33 (100.0)	33 (100.0)		33 (100.0)	33 (100.0)
CoNS (48)	37 (77.1)	48 (100.0)	0.000	48 (100.0)	48 (100.0)
Staph capitis (3)	3 (100.0)	3 (100.0)		3 (100.0)	3 (100.0)
Staph cohnii (1)	1 (100.0)	1 (100.0)		1 (100.0)	1 (100.0)
Staph epidermidis (10)	9 (90.0)	10 (100.0)	0.305	10 (100.0)	10 (100.0)
Staph hemolyticus (6)	3 (50.0)	6 (100.0)	0.046	6 (100.0)	6 (100.0)
Staph hominis (2)	2 (100.0)	2 (100.0)		2 (100.0)	2 (100.0)
Staph saprophyticus (23)	18 (78.3)	23 (100.0)	0.018	23 (100.0)	23 (100.0)
Staph sciuri (1)	1 (100.0)	1 (100.0)		1 (100.0)	1 (100.0)
Staph simulans (1)	0 (0.0)	1 (100.0)		1 (100.0)	1 (100.0)
Staph succinus (1)	0 (0.0)	1 (100.0)		1 (100.0)	1 (100.0)
Strep mitis/oralis (4)	3 (75.0)	4 (100.0)	0.285	4 (100.0)	4 (100.0)
Strep pneumoniae (3)	3 (100.0)	3 (100.0)		3 (100.0)	3 (100.0)
Enterococcus (22)	16 (72.7)	22 (100.0)	0.008	21 (95.5)	22 (100.0)
Enterococcus avium (1)	1 (100.0)	1 (100.0)		1 (100.0)	1 (100.0)
Enterococcus faecalis (11)	9 (81.8)	11 (100.0)	0.138	10 (90.9)	11 (100.0)	0.306
Enterococcus faecium (7)	4 (57.1)	7 (100.0)	0.051	7 (100.0)	7 (100.0)
Enterococcus gallinarum (1)	1 (100.0)	1 (100.0)		1 (100.0)	1 (100.0)
Enterococcus hirae (2)	1 (50.0)	2 (100.0)	0.248	2 (100.0)	2 (100.0)
Aerococcus viridans (1)	1 (100.0)	1 (100.0)		1 (100.0)	1 (100.0)
Total (111)	93 (83.8)	111 (100.0)	0.000	110 (99.1)	111 (100.0)	0.316