Comparison of an Automated System with Conventional Identification and Antimicrobial Susceptibility Testing

Table 2

Showing reproducibility of isolates on repeat testing in Phoenix.

Isolate	Difference in identification	Difference in AST	Type of error
Staphylococcus aureus ATCC 25923	None	None	—
Pseudomonas aeruginosa ATCC 27853	None	None	—
S. saprophyticus	S. aureus	None	Identification
S. saprophyticus	None	Chloramphenicol	Major error
S. haemolyticus	None	None	—
Enterococcus faecalis	None	Vancomycin	Major error
Enterococcus faecium (2)	None	Nitrofurantoin (2)	Minor error
		Moxifloxacin	Major error
Enterococcus durans	None	Gatifloxacin	Minor error
Leuconostoc lactis	None	None	—
Streptococcus group “B”	None	AST not in Phoenix database	—
Streptococcus pneumoniae	None	AST not in Phoenix database	—
Streptococcus sanguinis	None	AST not in Phoenix database	—
Enterobacter cloacae	None	Piperacillin/Tazobactam	Minor error
Acinetobacter baumannii	None	None	—
Chromobacterium violaceum	Burkholderia cepacia	AST not in Phoenix database	Identification
Pseudomonas oryzihabitans	None	AST not in Phoenix database	—
Stenotrophomonas maltophilia	None	None	—

None: no difference found.