Figure 6

Course of APPV infection in two CT affected piglets. qRT-PCR values of serum samples (red) and oral swabs (blue) are depicted together with the relative signal intensities of the NS3 blocking ELISA (yellow). The dotted grey line represents the empirical cut-off value of 0.5. Note the constant presence of APPV genomes in both animals in serum and saliva over the period of 12 weeks, whereas APPV specific antibodies could no longer be detected at the age of 8 weeks indicating maternal origin.