Table 2.

Quinolone agar dilution MICs for 28 pneumococcal strains not susceptible to ciprofloxacina

QuinoloneMIC range (μg/ml)MIC50 (μg/ml)MIC90 (μg/ml)
Gemifloxacin0.03–1.00.250.5
Ciprofloxacin8.0–>32.016.0>32.0
Levofloxacin4.0–>32.016.0>32.0
Sparfloxacin0.25–>32.08.016.0
Grepafloxacin0.5–16.04.08.0
Trovafloxacin0.25–8.01.04.0
  • a Strains with ciprofloxacin MICs of ≥8.0 μg/ml.