FIG 2.

PCV3 loads in sera from 4-week-old (A) and 8-week-old (B) PCV3-inoculated piglets were quantitatively assayed by real-time PCR. PCV3 ORF2-specific antibody dynamics in sera of the 4-week-old (C) and 8-week-old (D) PCV3-inoculated piglets were determined by using an indirect ELISA. The values presented are the means of the results from the five piglets of the 8-week-old PCV3-inoculated experiment at all the indicated time points postinoculation or of the 4-week-old PCV3-inoculated experiment at 7 and 14 dpi in all groups, except for the four piglets at 21 dpi and the remaining three piglets at 28 dpi in groups 2 and 3, due to death of the piglets; error bars show the standard deviations. *, P < 0.05; **, P < 0.01.