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

Table 5

Detailed results of microorganisms that either were misidentified or could not be identified by one or both MALDI-TOF MS systems.

Test groups	Reference	Autof ms1000			Bruker Biotyper
		Result	Range	Agreement	Result	Score	Agreement
Preserved strains	Streptococcus pneumoniae	S. pneumoniae	9.400	ID species	S. pneumoniae	1.924	ID genus
	Serratia nematodiphila	S. marcescens	9.431	MisID species	S. ureilytica	2.136	MisID species
	Candida orthopsilosis	C. orthopsilosis	9.507	ID species	C. orthopsilosis	1.82	ID genus
	Streptococcus parasanguinis	S. parasanguinis	9.361	ID species	S. parasanguinis	1.907	ID genus
	Candida glabrata	C. glabrata	9.441	ID species	C. glabrata	1.866	ID genus
	Eggerthella lenta	E. lenta	8.967	ID genus	E. lenta	2.114	ID species
	Acinetobacter bereziniae	A. guillouiae	9.127	MisID species	A. bereziniae	2.177	ID species
	Candida auris	No reliable ID	5.401	No ID	C. auris	2.031	ID species
	Candida auris	No reliable ID	4.755	No ID	C. auris	1.892	ID genus
Clinical isolates	Candida auris	No reliable ID	4.952	No ID	C. auris	2.073	ID species
	Enterococcus gallinarum	E. casseliflavus	9.543	MisID species	E. casseliflavus	1.905	ID genus
	Klebsiella oxytoca	Raoultella ornithinolytica	9.159	MisID species	K. oxytoca	2.173	ID species
	Staphylococcus epidermidis	S. epidermidis	9.508	ID species	S. epidermidis	1.982	ID genus

Abbreviations: ID = identification; MisID = misidentification.