Comparison of Autof ms1000 and Bruker Biotyper MALDI-TOF MS Platforms for Routine Identification of Clinical Microorganisms

Table 4

Comparison of identification performance in clinical isolates.

Species		Autof ms1000				Bruker Biotyper
		ID species	ID genus	No ID	MisID species	ID species	ID genus	No ID	MisID species
Enterobacterales (%)	131	130 (99.2)	0 (0.0)	0 (0.0)	1 (0.8)	131 (100.0)	0 (0.0)	0 (0.0)	0 (0.0)
Citrobacter freundii complex	6	6	0	0	0	6	0	0	0
Enterobacter aerogenes	10	10	0	0	0	10	0	0	0
Enterobacter cloacae complex	14	14	0	0	0	14	0	0	0
Escherichia coli	54	54	0	0	0	54	0	0	0
Klebsiella oxytoca	2	1	0	0	1	2	0	0	0
Klebsiella pneumoniae complex	29	29	0	0	0	29	0	0	0
Morganella morganii	3	3	0	0	0	3	0	0	0
Proteus mirabilis	6	6	0	0	0	6	0	0	0
Raoultella ornithinolytica	4	4	0	0	0	4	0	0	0
Serratia marcescens	3	3	0	0	0	3	0	0	0
Nonfermenters (%)	41	41 (100.0)	0 (0.0)	0 (0.0)	0 (0.0)	41 (100.0)	0 (0.0)	0 (0.0)	0 (0.0)
Acinetobacter baumannii complex	9	9	0	0	0	9	0	0	0
Elizabethkingia meningoseptica	1	1	0	0	0	1	0	0	0
Pseudomonas aeruginosa	24	24	0	0	0	24	0	0	0
Stenotrophomonas maltophilia	7	7	0	0	0	7	0	0	0
Other Gram-negative rods (%)	2	2 (100.0)	0 (0.0)	0 (0.0)	0 (0.0)	2 (100.0)	0 (0.0)	0 (0.0)	0 (0.0)
Haemophilus influenzae	2	2	0	0	0	2	0	0	0
Gram-positive cocci (%)	118	117 (99.2)	0 (0.0)	0 (0.0)	1 (0.8)	116 (98.3)	2 (1.7)	0 (0.0)	0 (0.0)
Enterococcus avium	1	1	0	0	0	1	0	0	0
Enterococcus faecalis	15	15	0	0	0	15	0	0	0
Enterococcus faecium	32	32	0	0	0	32	0	0	0
Enterococcus gallinarum	1	0	0	0	1	0	1	0	0
Staphylococcus aureus	29	29	0	0	0	29	0	0	0
Staphylococcus capitis	3	3	0	0	0	3	0	0	0
Staphylococcus caprae	1	1	0	0	0	1	0	0	0
Staphylococcus epidermidis	16	16	0	0	0	15	1	0	0
Staphylococcus haemolyticus	2	2	0	0	0	2	0	0	0
Staphylococcus hominis	5	5	0	0	0	5	0	0	0
Staphylococcus lugdunensis	3	3	0	0	0	3	0	0	0
Streptococcus agalactiae	8	8	0	0	0	8	0	0	0
Streptococcus anginosus	1	1	0	0	0	1	0	0	0
Streptococcus pyogenes	1	1	0	0	0	1	0	0	0
Fungi (%)	10	9 (90.0)	0 (0.0)	1 (10.0)	0 (0.0)	10 (100.0)	0 (0.0)	0 (0.0)	0 (0.0)
Candida albicans	4	4	0	0	0	4	0	0	0
Candida auris	1	0	0	1	0	1	0	0	0
Candida krusei	3	3	0	0	0	3	0	0	0
Candida lusitaniae	1	1	0	0	0	1	0	0	0
Rhodotorula mucilaginosa	1	1	0	0	0	1	0	0	0
Total (%)	302	299 (99.0)	0 (0.0)	1 (0.3)	2 (0.7)	300 (99.3)	2 (0.7)	0 (0.0)	0 (0.0)

Abbreviations: ID = identification; MisID = misidentification; NA = not applicable.