Figure 2.
A − Porcine circovirus type 2 (PCV-2)-specific ELISA antibody levels in serum of pigs from PCV-2a (
), PCV-2b (
), PCV-2d (
), PCV-2e (
), and negative control (
) groups. B − PCV-2-specific ELISA antibody levels in serum of pigs from PCV-2a/PRRSV (
), PCV-2b/PRRSV (
), PCV-2d/PRRSV (
), PCV-2e/PRRSV (
), PRRSV (
;), and negative control (
) groups. C − Mean values of the genomic copy number of porcine circovirus type 2 (PCV-2) DNA in serum of pigs from PCV-2a (
), PCV-2b (
), PCV-2d (
), PCV-2e (
), and negative control (
) groups. D − Mean values of the genomic copy number of porcine circovirus type 2 (PCV-2) DNA in serum of pigs from PCV-2a/PRRSV (
), PCV-2b/PRRSV (
), PCV-2d/PRRSV (
), PCV-2e/PRRSV (
), PRRSV (
), and negative control (
) groups. Variation is expressed as the standard deviation. Different superscripts (a, b, c, and d) indicate significant (P < 0.05) difference among either single-infected or dual-infected groups.