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. 2014 Nov 3;9(11):e111809. doi: 10.1371/journal.pone.0111809

Figure 2. Linear relationship between the B. burgdorferi viability and Green/Red fluorescence ratio of the SYBR Green I/PI assay.

Figure 2

(A) The linear relationship between the number of spirochetes and Green/Red fluorescence ratio. (B) Emission spectra of suspensions of various proportions of live and isopropyl alcohol-killed B. burgdorferi were obtained, and the Green/Red fluorescence ratios were calculated for each proportion of live/dead cells. The line is a least-square fit of the relationship between percentage of live bacteria and Green/Red fluorescence ratio.