Figure 3. The deletion of LuxS gene did not affect the proliferation ability of E. faecalis. (a) The growth curves of Δ LuxS E. faecalis strain and the ATCC 29212 strain every 2 h from 0 h to 72 h. (b) The CFU counting of Δ LuxS E. faecalis strain and the ATCC 29212 strain.