Monitoring the ratio of viable cell number to total cell number for S. mutans in (A) planktonic cells and (B) biofilms, by PMA-qPCR. Both planktonic cells and biofilms were treated with 0–0.003% H2O2 for 24 h. The mean ± S.D. values of independent triplicate data are shown. *p < 0.05, **p < 0.01.
Yasunaga et al. BMC Microbiology 2013 13:157 doi:10.1186/1471-2180-13-157