Figure 3

Evaluation of microscopic lung pathology in the pigs on each necropsy day. A Representative slides of H&E-stained lung sections used for scoring microscopic lesions in the uninfected (NC) and infected (I) pigs based on a 4-point scale from 0 to 3, with 0 representing no lesion, 1 representing mild interstitial pneumonia, 2 representing moderate/multifocal interstitial pneumonia and 3 representing severe interstitial pneumonia. B Mean microscopic lung lesion scores from pigs belonging to both groups on the particular day of necropsy. The error bars represent the SEM, and the bars showing asterisks represent values that differ significantly from each other (* indicates p ≤ 0.05 and ** indicates p ≤ 0.01).