A Prospective Evaluation of Two Rapid Phenotypical Antimicrobial Susceptibility Technologies for the Diagnostic Stewardship of Sepsis

Table 2

Monomicrobial BCs: identification results of the direct MALDI-TOF MS ID and Pheno ID compared to culture-based ID.

Direct MALDI-TOF ID	MALDI-TOF score value				Accelerate Pheno ID	Accelerate Pheno comment	Total
	3.000–2.300	2.299–2.000	1.999–1.700	<1.700
Acinetobacter baumannii		1			Acinetobacter baumannii		1
Citrobacter koseri	1	2			Citrobacter spp.		3
Enterobacter cloacae		2	2		Enterobacter spp.; Enterobacter spp./Serratia marcescens	False identification, additional organism detected, no AST (); Gram-negative detected correctly, no AST, growth control failure ()	4
Escherichia coli	15	4			Escherichia coli	Gram-negative detected correctly, no AST, growth control failure ()	19
Klebsiella pneumoniae	13	6			Klebsiella spp.	Gram-negative detected correctly, no AST, growth control failure ()	19
Proteus mirabilis		1			Proteus spp.		1
Pseudomonas aeruginosa	1				Pseudomonas aeruginosa		1
Serratia marcescens		2			Serratia marcescens		2
Enterococcus faecalis		1			Enterococcus faecalis		1
Enterococcus faecium	1	2			Enterococcus faecium; Enterococcus faecium/CoNS	False identification, additional organism detected, no AST ()	3
Staphylococcus aureus	1	2	1		Staphylococcus aureus	Gram-positive detected correctly, no AST, growth control failure ()	4
Streptococcus agalactiae	1				Streptococcus agalactiae	Organism ineligible for susceptibility testing ()	1
Streptococcus pneumoniae		1			Streptococcus spp.	Organism ineligible for susceptibility testing ()	1
Total	33	24	3				60