Fig. 2.

Bacterial electricity and nasal colonized were reduced by pretreatment of S. epidermidis with roseoflavin (A) Electricity indicated by voltage changes (mV) was detected in the LCC culture of S. epidermidis pretreated with/without roseoflavin. (B) Nasal cavities of ICR mice were inoculated daily with S. epidermidis pretreated with/without roseoflavin for 3 days. The number (CFU g⁻¹) of S. epidermidis on nasal cavities were counted by plating serial dilutions (1:10⁰–1:10⁵) of nasal homogenates on a streptomycin supplemented TSB agar plate. Bacterial CFU per gram (CFU g⁻¹) of excised nasal cavities was calculated. Data are represented as mean ± SD with the P‐value of < 0.01 (**) from experiments in triplicate. Five mice per group were evaluated.