FIGURE 3.

Oxidative stress affects equally Streptococcus pneumoniae wt and ΔpezAT strains. Pneumococcal cultures at OD₆₅₀∼0.3 were treated with H₂O₂, 20 min, 37°C, and the number of survival cells were counting to determine the number of CFU/ml on solid medium. t-test was used to evaluate the statistical differences and no differences (p-value < 0.05) were observed for both strains under oxidative stress.