. 2012 Dec;50(12):4087–4090. doi: 10.1128/JCM.02387-12

TABLE 1.

Comparison of BD Phoenix, API 20 Strep, and MALDI Biotyper for identification of clinical (n = 39) and reference (n = 7) α-hemolytic streptococci at the group and species levels

Species by 16S rRNA sequencing	No. of isolates (%)	Agreement by BD Phoenix (%)	Agreement by API 20S (%)	Agreement using Biotyper >2 (%)	Agreement using Biotyper >1.7 (%)
Mitis group	28 (61)^a	15 (54)^c	21 (75)^c	17 (61)^c	18 (64)^c
S. mitis	20 (71)^b	3 (18)^d	9 (45)^d	0 (0)^d	0 (0)^d
S. oralis	7 (25)	2 (22)	0 (0)	4 (57)	4 (57)
S. infantis	1 (4)	0 (0)	0 (0)	0 (0)	0 (0)
Sanguinis group	11 (24)^a	8 (73)^c	3 (27)^c	8 (73)^c	10 (91)^c
S. sanguinis	4 (36.5)^b	3 (75)^d	1 (17)^d	3 (75)^d	4 (100)^d
S. gordonii	5 (45.5)	2 (40)	0 (0)	5 (100)	5 (100)
S. parasanguinis	2 (18)	2 (100)	0 (0)	0 (0)	1 (50)
Bovis group	2 (4)^a	0 (0)^c	2 (100)^c	2 (100)^c	2 (100)^c
Streptococcus lutetiensis	2 (100)^b	0 (0)^d	0 (0)^d	2 (100)^d	2 (100)^d
Anginosus group	2 (4)^a	2 (100)^c	1 (50)^c	2 (100)^c	2 (100)^c
Streptococcus anginosus	2 (100)^b	2 (100)^d	0 (0)^d	2 (100)^d	2 (100)^d
Salivarius group	1 (2)^a	1 (100)^c	1 (100)^c	0 (0)^c	1 (100)^c
Streptococcus salivarius	1 (100)^b	1 (100)^d	1 (100)^d	0 (0)^d	1 (100)^d
Mutans group	1 (2)^a	1 (100)^c	1 (100)^c	1 (100)^c	1 (100)^c
S. mutans	1 (100)^b	1 (100)^d	1 (100)^d	1 (100)^d	1 (100)^d
Granulicatella adiacens^e	1 (2)^a	0 (0)	0 (0)	0 (0)	1 (100)^d
Total	46
Total agreement by group^e		27 (59)	29 (63)	30 (65)	34 (74)
Total agreement by species		16 (35)	12 (26)	17 (37)	21 (46)

Percentage of all isolates in each streptococcal group.

Percentage of each species within each streptococcal group.

Percentage of each group assigned to correct group by a test.

Percentage of each species assigned to correct species by a test.

Granulicatella adiacens isolate not included when considering results by group.