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The currently used Bartha-K61 strain is a very safe and effective vaccine against pseudorabies (PR) and has played a critical role in the control and eradication of PR worldwide. Since late 2011, however, PR reemerged among Bartha-K61-vaccinated pig population in many regions in China. Our previous studies demonstrated that the Bartha-K61 vaccine was unable to provide complete protection from the...
Classical swine fever (CSF) is an economically important, highly contagious swine disease caused by classical swine fever virus (CSFV). Marker vaccines and companion serological diagnostic tests are thought to be a promising strategy for future control and eradication of CSF. Previously, we have demonstrated that an adenovirus-vectored Semliki forest virus replicon construct expressing the E2 glycoprotein...
Alphavirus replicon-based DNA vaccines have emerged as a promising approach to generation of antigen-specific immune responses. However, due to their low immunogenicity, there is a need for other approaches to enhance the vaccine potency. In this study, electroporation (EP) and a plasmid expressing porcine interleukin 2 (IL-2) were used to improve the immunogenicity of an alphavirus replicon-based...
The authors prepared experimental lipoid adjuvant of the oil-in-water (O/W) type, based on squalene (ESA: experimental squalene adjuvant), intended for liquid inactivated veterinary vaccines. The final concentration of squalene in the vaccine was 5% (w/v). Detergents Poloxamer 105 in the concentration of 4% (w/v) and Abil-Care in the concentration of 2% were used as emulsifiers. The water component...
Model experiments on laboratory animals (guinea pigs) were carried out to test the possible allergic reaction (possibility of sensitisation) to the repeated administration of an experimental lipoid adjuvant prepared on the basis of squalene (experimental squalene adjuvant-ESA). No significant differences were observed between the animals sensitised-provoked with ESA and control animals. In order to...
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