Number of viable bacteria recovered following exposure to 1.93 J/cm2 of 665 nm laser light and different concentrations of methylene blue. The clear bars represent recovery of the wild type strain LS-1 and the grey bars the isogenic hemB SCV. Error bars represent the standard deviation from the mean. **P < 0.01, ***P < 0.001 (ANOVA).
Tubby et al. BMC Microbiology 2013 13:201 doi:10.1186/1471-2180-13-201