Journal
JOURNAL OF CLINICAL MICROBIOLOGY
Volume 46, Issue 6, Pages 2095-2098Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JCM.02216-07
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Funding
- Italian Ministry for University and Research [PRIN 2005, 2005061894_003]
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A total of 78 isolates of Pseudomonas aeruginosa grouped according to the phenotype for ceftazidime and imipenem susceptibility/resistance were used to assess the accuracy of the Vitek 2 system in antimicrobial susceptibility testing. Comparisons were made with a MIC gradient test for piperacillin-tazobactam, ceftazidime, aztreonam, imipenem, meropenem, gentamicin, and ciprofloxacin. For the total of 546 isolate-antimicrobial combinations tested, the category agreement was 83.6%, with 2.0, 1.6, and 12.8% very major, major, and minor errors, respectively. Vitek 2 accuracy was influenced differently by the mechanism responsible for resistance, and interpretation of the results in relation to phenotype could improve the performance of the system.
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