Lesion scores of the lungs. Lungs were scored for lesions as previously described . Mean and standard deviation values are graphically reported in figure. Statistical analysis by Ordinary One-way ANOVA, Brown–Forsythe, Bartlett’s and Dunnett’s multiple comparisons tests showed no significant difference between mean scores and standard deviations of each individual group. 1: PBS; 2: VacJ; 3: ApfA; 4: OMVs; 5: VacJ + OMVs; 6: ApfA + OMVs; 7: VacJ + ApfA + OMVs.