TABLE 4.

EA, ACC, and discrepancies between VITEK 2 and reference microdilution method for 19 ceftazidime-resistant^a P. aeruginosa strains

Antimicrobial agent	Percent
	EA	ACC	Minor error	Major error	Very major error
Cefepime	89.5	78.9	21.1	0.0	0.0
Cefotaxime	100.0	94.7	5.3	0.0	0.0
Ceftazidime	94.7	94.7	5.3	0.0	0.0
Ciprofloxacin	94.7	100.0	0.0	0.0	0.0
Gentamicin	100.0	89.5	10.5	0.0	0.0
Imipenem	100.0	100.0	0.0	0.0	0.0
Levofloxacin	84.2	100.0	0.0	0.0	0.0
Meropenem	84.2	100.0	0.0	0.0	0.0
Piperacillin	89.5	89.4	0.0	5.3	5.3
Tobramycin	100.0	100.0	0.0	0.0	0.0
All agents	93.7	94.8	4.2	0.5	0.5

^aStrains resistant to ceftazidime (and to ticarcillin and piperacillin) and susceptible to the carbapenems and fluoroquinolones tested.