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A Sindbis virus (SINV) replicon-based DNA vaccine encoding Rabies virus (RABV) glycoprotein G developed previously (Saxena et al., Vaccine 26, 6592, 2008) was used for immunization of dogs against rabies. The intradermal injection of DNA vaccine into external ear generated protective level of virus neutralizing antibodies. The cellular immune response was specific to RABV, in particular by an increase in CD3 + CD4 + and CD3 + CD8 + lymphocytes. This study has demonstrated that the SINV replicon-based DNA vaccine encoding RABV G is capable of inducing the protective level of specific immune response in dogs.

The complete genome of a lapinized classical swine fever virus (CSFV) vaccine strain was amplified into nine overlapping fragments by RT-PCR, and nucleotide sequences were determined. Complete genome sequence alignment and phylogenetic analysis indicated 92.6-98.6% identities at the nucleotide level with other reported CSFV strains and could be grouped into subgroup 1.1 along with other attenuated strains of CSFV. The 5'-UTR demonstrated >97.0% nucleotide similarity with most of vaccine CSFV strains from China. Further, its 3'-UTR sequence indicated a length similar to all the CSFV strains from China with >98.0% nucleotide similarity, although high length heterogeneity of 3'-UTR was reported among different CSFV strains. There was 12 nt (TTTTCTTTTTTT) insertion in 3'-UTR similar to other reported attenuated vaccine strains. However, secondary structure of 3'-UTR indicated that Indian CSFV strain requires further passage to obtain a 3'-UTR structure similar to most of the attenuated strains.

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