Figure 5.

Evolved mechanism of suppression of S. aureus by E. faecalis. (a) Suppression and enzyme-mediated lifting of suppression of S. aureus outside the host. S. aureus cfus were counted when the pathogen was grown alone and co-cultured with ancestral or CCE E. faecalis. Counts were also made upon the addition of CAT and SOD, enzymes that remove the presence of reactive oxygen species. Error bars, 1 s.e. (b) Mean superoxide production (measure of luminescence controlling for OD₆₀₀) across exponential growth phase of ancestral, SE and CCE E. faecalis (the latter at G5 and G15).