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. 2010 Nov 24;6(11):e1001210. doi: 10.1371/journal.ppat.1001210

Figure 3. Virulence testing of isogenic isolates in sheep.

Figure 3

Sheep were challenged with the wild type, the three protease mutants and their complemented derivatives in a blind pen trial. The total weighted foot score (TWFS) for individual sheep at week three is shown. The mean and the s.e.m. for each group are shown. Each mutant is significantly different to the wild-type, while the aprV2/aprV2+ and aprV2/aprB2+ complemented strains are not significantly different to wild-type (P<0.05, nā€Š=ā€Š8, one-way ANOVA). NC: negative control, not infected with bacteria.