Figure 3

Characterization of lung macroscopic lesions caused by Salmonella Choleraesuis at 21 days post-infection. A Lung gross lesions severity and percentage of piglets affected in each group. B Lung macroscopic lesions score separated per groups. CP: positive control group; I: immunized group; SE: standard error of the mean; Type I: interstitial pneumonia with 1 lobe affected; Type II: interstitial pneumonia with 2 lobes affected; Type III: interstitial pneumonia with 3 lobes affected; Type IV: interstitial pneumonia with 4 lobes affected.