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. 2017 Jun 22;8:1158. doi: 10.3389/fmicb.2017.01158

Figure 6.

Figure 6

BHI-Ft S4 appears more virulent than MHB-Ft S4 to mice immunized with BHI-LVS. Survival of C57BL/6 mice vaccinated twice with PBS or live BHI-Ft LVS prior to challenge with 29.5 ± 2.5 CFU of Ft S4 grown in MHB or BHI. Symbols are as defined in Fig 4; survival differences between immunized mice challenged with MHB-S4 and BHI-S4 are indicated by the stated p values. Asterisks indicate significant differences between groups (PBS or LVS) that were identically-challenged; actual p-values are p < 0.0001 (MHB-S4) and p < 0.017 (BHI-S4). All significant differences are indicated. MTS values are >21 d (LVS/MHB-S4), 13.8 d (LVS/BHI-S4), 6 d (PBS/MHB-S4), and 5.8 d (PBS/BHI-S4). The survival data from 46 mice (10–12 mice/group) are represented as Kaplan–Meier survival curves with statistical analysis by the Log-rank (Mantel–Cox) test.