Fig. 9

Quantification of residual viral loads in the lungs and evaluation of gross and microscopic lung lesions at 28 dpc. a Residual viral loads in the lungs of PRRSV-infected pigs at 28 dpc. Viral titres were calculated based on the standard curve of the cycle threshold (Ct) number plotted against the known viral titre of VR2332c. b Gross and c microscopic lung scores were recorded after necropsy. Lung scores were plotted as the mean values of the lesion scores from 5 pigs in each group, and the error bars represent the SEM