Background: Porcine circovirus type 2 (PCV2) is the primary cause of an emerging swine disease, postweaning multisystemic wasting syndrome, that is responsible for economic losses. To develop an effective vaccine for PCV2, we evaluated a heterologous prime-boost vaccine approach, using a gene gun-mediated naked DNA vector as a priming and modified vaccinia virus ankara (MVA) as a booster, in Balb/c mice.
Methods: Three open reading frames (ORF) of PCV2 viral samples from infected pigs were amplified, and gene gun-mediated DNA priming vaccination was performed followed by boosts with MVA vectors expressing the same ORFs of PCV2.