Synergy and Mode of Action of Ceftazidime plus Quercetin or Luteolin on Streptococcus pyogenes

Figure 6

The effect of ceftazidime, luteolin, and quercetin alone and in combination on average cross section of S. pyogenes DMST 30653 cell areas from TEM. Con = control (drugs free); Lut (64) = 64 μg mL⁻¹ luteolin; Que (64) = 64 μg mL⁻¹ quercetin; Cef (0.25) = 0.25 μg mL⁻¹ ceftazidime; Cef (0.09) + Lut (12) = ceftazidime 0.09 μg mL⁻¹ plus luteolin 12 μg mL⁻¹; Cef (0.09) + Que (3) = ceftazidime 0.09 μg mL⁻¹ plus quercetin 3 μg mL⁻¹. The examination was carried out in three experiments and all graphs are illustrated as mean ± SEM. Means sharing the same superscript are not significantly different from each other (Scheffe’s, ).