Vancomycin MICs for Staphylococcus aureus isolates in a pediatric hospital with a high rate of staphylococcal infections were examined for any increase over a 7-year period. A broth microdilution scheme allowed direct comparison of the MICs generated by this method to MICs generated by Etest. MICs generated by both methods were determined with the same inoculum suspension. One hundred sixty-fiv...

OBJECTIVE The evaluation of the Sensititre YeastOne and Etest methods for determining susceptibility to amphotericin B and itraconazole by comparing the MICs obtained by these methods at different times of reading with those of the M38-A broth microdilution method. METHODS Sixty-three clinical isolates of Aspergillus spp. (23 Aspergillus flavus, 24 Aspergillus fumigatus, nine Aspergillus nige...

The performances of the Etest and the disk diffusion methods for testing of the susceptibilities of 235 Candida glabrata isolates to fluconazole and voriconazole were compared with that of the National Committee for Clinical Laboratory Standards (NCCLS) approved standard broth microdilution (BMD) method. The NCCLS method used RPMI 1640 broth medium, and MICs were read after incubation for 48 h ...

1 mg/L by BMD and 2 mg/L by the Etest (Table 2). When the geometric mean MIC values were compared, they varied from 0.97 to 1.28 by BMD and 0.88 to 1.23 by the Etest. The vancomycin MIC values showed fluctuation from year to year. This fluctuation was not statistically significant either by the BMD method (P ¼ 0.225) or the Etest (P¼ 0.136). Although the vancomycin MIC values fluctuated from ye...

The MICs for 101 isolates of Neisseria gonorrhoeae obtained by Etest (AB-Biodisk, Solna, Sweden) and the agar dilution method on GC medium base supplemented with 1% Kellog's defined supplement (GCMB) were compared. The overall percent agreement (within 1 log2 dilution) between methods was greater than 97.9. The Pearson's correlation coefficients for penicillin, tetracycline, erythromycin, and c...

We investigated the performance of blood and chocolate agar as alternatives to Middlebrook 7H11 agar for testing the susceptibility of Mycobacterium tuberculosis to first-and second-line drugs by the Etest method. A total of 39 strains of M. tuberculosis including 22 multidrug-resistant M. tuberculosis strains and 17 susceptible strains were tested. In conclusion, our results showed that chocol...

The disk approximation method, Etest (AB Biodisk, Solna, Sweden), and VITEK 2 system (bioMérieux, Marcy l’Etoile, France) were used to study 399 extended-spectrum h-lactamase (ESBL)-producing (115 strains) and non-ESBL-producing (284 strains) clinical isolates of Escherichia coli after recommended procedures. Comparative study of the phenotypic findings yielded data on the sensitivity, specific...

In a small-scale harmonization study involving nine laboratories in eight European countries, the intra- and interlaboratory performances of two commercially available systems, i.e., the VetMIC microplate system and Etest, for antimicrobial susceptibility testing of nonenterococcal lactic acid bacteria (NELAB) and bifidobacteria were analyzed. In addition, one laboratory also performed standard...

Sir, We read with great interest the study published by Mushtaq et al. about the performance of Oxoid M.I.C.EvaluatorTM (M.I.C.E.) (Thermo Fisher Scientific, Basingstoke, UK) strips compared with those of the Etest (AB bioMérieux, Marcy l’Étoile, France) and agar dilution for determination of MICs using the BSAC guidelines. We recently had the opportunity to carry out a similar study that compa...