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. 2013 Oct 29;6:71–75. doi: 10.4137/MBI.S12996

Table 2.

Susceptibility rates of Streptococcus pyogenes and MIC values (E-test).*

ANTIBIOTICS R (%) I (%) S (%) MIC50 MIC90 GEOM MEAN MIC RANGE
β-lactamins
 Penicillin G 0 0 100 0.016 0.023 0.012 0.004–0.032
 Cefpodoxime 0 0 100 0.016 0.016 0.016 0.0016–0.023
 Cefixime 0 0 100 0.094 0.094 0.071 0.016–0.125
 Cefotaxime 0 0 100 0.023 0.023 0.021 0.008–0.047
 Ceftriaxone 0 0 100 0.023 0.023 0.023 0.012–0.064
Macrolides
 Erythromycin 0 0 100 0.094 0.125 0.079 0.032–0.019
 Azythromycin 0 2.5 97.5 0.38 0.5 0.355 0.125–0.75
Phenicols
 Chloramphenicol 0 0 100 3 4 0.723 2–4
Fluoroquinolones
 Levofloxanine 0 0 100 0.75 0.075 0.738 0.38–2
Glycopeptides
 Teicoplanin 0 0 100 0.094 0.094 0.206 0.023–2
*

Susceptibility rates have been interpreted according to CLSI breakpoints.

Abbreviations: R, resistant; I, intermediate; S, susceptible; MIC, minimal inhibitory concentration (mg/L).