Abstract
A Sindbis virus replicon-based DNA vaccine containing VP2 gene of canine parvovirus (CPV) was delivered by Escherichia coli to elicit immune responses. The orally immunized dogs developed CPV-specific serum IgG and virus neutralizing antibody responses. The cellular immune responses analyzed using lymphocyte proliferation test and flow cytometry indicated CPV-specific sensitization of both CD3+CD4+ and CD3+CD8+ lymphocytes. This study demonstrated that the oral CPV DNA vaccine delivered by E. coli can be considered as a promising approach for vaccination of dogs against CPV.
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