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BioMed Research International
Volume 2015 (2015), Article ID 684945, 10 pages
http://dx.doi.org/10.1155/2015/684945
Research Article

Construction of a gE-Deleted Pseudorabies Virus and Its Efficacy to the New-Emerging Variant PRV Challenge in the Form of Killed Vaccine

1National Research Center for Veterinary Medicine, Road Cuiwei, High-Tech District, Luoyang 471003, China
2College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450002, China

Received 7 March 2015; Revised 10 April 2015; Accepted 16 April 2015

Academic Editor: Akikazu Sakudo

Copyright © 2015 Tongyan Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The new-emerging PRV variants plague the vaccinated pigs and caused huge economic loss to local pig industry in China since 2011. The current commercial PRV vaccines cannot provide complete protection as the new-emerging PRV variants are antigenically different from the classical viruses. It is urgent to develop more safe and effective PRV vaccines based on the current circulating field isolates. In this study, a gE gene-deleted PRV based on the PRV HN1201, a representative PRV variant, was generated and the efficacy was tested on 3-week-old pigs in the form of killed vaccine. After fatal PRV HN1201 challenge, all vaccinated pigs survived without showing any clinical symptoms, but all unvaccinated pigs exhibited pseudorabies-specific respiratory and neurological signs with 100% mortality rate within 6 days after infection. The vaccinated pigs developed high level of gB and neutralizing antibodies after vaccination which may correlate to the protection provided by vaccine. Therefore, this gE gene-deleted PRV could be a promising vaccine candidate for the control of currently epidemic pseudorabies in China.