Abstract
Outbreaks of pseudorabies (PRs) have occurred in Yunnan, China, which caused significant economic loss. To determine the prevalence and origin of PR in Yunnan, especially among vaccinated pigs, overall 791 samples of blood, tissue, semen, and sera were analyzed by serological methods, PCR, and sequence analysis of gD gene. Detection with viral gI antibody or PCR showed that the yearly positive rates of PR virus (PRV) in Yunnan from 2010 to 2014 were 48.15, 21.26, 2.17, 5.22, and 0.35%, respectively, with an average of 15.43%. In general, the incidence declined through the period of 2010–2014 probably due to the application of PRV eradication strategies. A phylogenetic tree was constructed based on the complete sequence of gD gene, with all strains clustered into two independent clades, i.e., Asian and European–American clades. The virus isolates from Henan, Tianjin, Heilongjiang, Sichuan, Shandong, Fujian, Xinjiang, Hubei, Guangdong, and Yunnan fell into Asian group, which harbored South Korea isolate. Four Yunnan virus isolates together with South Korean Namyangju fell into in the European–American clade. It showed that PR was pandemic as there was not a clear clue about the geographical origin of the PRV isolates in China since 2010.
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References
W. Hong, H. Chen, L. Fang, R. Zhou, Q. He et al., Clone and nucleotide sequence analysis of gD gene of pseudorabies virus Ea strain. Acta Vet. Zootech. Sin. 32(3), 235–243 (2001)
B.G. Klupp, C.J. Hengartner, T.C. Mettenleiter, L.W. Enquist, Complete, annotated sequence of the pseudorabies virus genome, J. Virol. 78(1), 424–440 (2004). Erratum in: J. Virol. 78(4), 2166
T.C. Mettenleiter, Aujeszky’s disease (pseudorabies) virus: the virus and molecular pathogenesis—state of the art, June 1999. Vet. Res. 31(1), 99–115 (2000)
L.E. Pomeranz, A.E. Reynolds, C.J. Hengartner, Molecular biology of pseudorabies virus: impact on neurovirology and veterinary medicine. Microbiol. Mol. Biol. Rev. 69(3), 462–500 (2005)
Q.Y. Yang, Z. Sun, F.F. Tan, L.H. Guo, Y.Z. Wang et al., Pathogenicity of a currently circulating Chinese variant pseudorabies virus in pigs. World J. Virol. 5(1), 23–30 (2016). doi:10.5501/wjv.v5.i1.23
A. Moreno, E. Sozzi, G. Grilli, L.R. Gibelli, D. Gelmetti et al., Detection and molecular analysis of pseudorabies virus strains isolated from dogs and a wild boar in Italy. Vet. Microbiol. 177(3–4), 359–365 (2015). doi:10.1016/j.vetmic.2015.04.001
S. Verpoest, A.B. Cay, N. de Regge, Molecular characterization of Belgian pseudorabies virus isolates from domestic swine and wild boar. Vet. Microbiol. 172, 72–77 (2014)
T.Q. An, J.M. Peng, Z.J. Tian, H.Y. Zhao, N. Li et al., Pseudorabies virus variant in Bartha-K61-vaccinated pigs, China, 2012. Emerg. Infect. Dis. 19(11), 1749–1755 (2013). doi:10.3201/eid1911.130177
W. Fan, J. Hu, J. Wu, X. Yuan, Z. Zhang et al., Isolation and identification of LA strain of pseudorabies virus. Chin. J. Vet. Sci. 23(6), 538–540 (2003). doi:10.16303/j.cnki.1005-4545.2003.06.008
Y. Luo, N. Li, X. Cong, C.H. Wang, M. Du et al., Pathogenicity and genomic characterization of a pseudorabies virus variant isolated from Bartha-K61-vaccinated swine population in China. Vet. Microbiol. 174(1–2), 107–115 (2014). doi:10.1016/j.vetmic.2014.09.003
X. Zeng, Y. Wu, J. Chen, J. Yao, B. Wu, Isolation and identification of porcine pseudorabies virus FZ strain and sequence analysis of the gD gene of the strain. J. Fujian Agric. For. Univ (Nat. Sci. Ed.) 40(5), 501–510 (2011). (in Chinese)
L. Chen, T. Zhao, L. Zhang, Y. Li, Clone and sequencing of gD and gE gene of PRV XIN-W isolate of pseudorabies virus, Prog. Vet. Med. 26(1), 66–70, 88 (2005) (in Chinese)
W.A. Mulder, J.M. Pol, E. Gruys, L. Jacobs, M.C. De Jong et al., Pseudorabies virus infections in pigs. Role of viral proteins in virulence, pathogenesis and transmission. Vet. Res. 28, 1–17 (1997)
Y. Wang, S. Qiao, X. Li, W. Xie, J. Guo et al., Molecular epidemiology of outbreak-associated pseudorabies virus (PRV) strains in central China. Virus Genes 50(3), 401–409 (2015). doi:10.1007/s11262-015-1190-0
Z. Gu, C. Hou, H. Sun, W. Yang, J. Dong et al., Emergence of highly virulent pseudorabies virus in southern China. Can. J. Vet. Res. 79, 221–228 (2015)
J.M. Peng, T.Q. An, H.Y. Zhao, Y.M. Liu, J.Z. Chen et al., Identification and antigenic variation of new epidemiology of pseudorabies virus from swine. Chin. J. Prev. Vet. Med. 35(1), 1–4 (2013). (in Chinese)
C. Ye, J.C. Guo, J.C. Gao, T.Y. Wang, K. Zhao et al., Genomic analyses reveal that partial sequence of an earlier pseudorabies virus in China is originated from a Bartha-vaccine-like strain. Virology 491, 56–63 (2016). doi:10.1016/j.virol.2016.01.016
C. Ye, Q.Z. Zhang, Z.J. Tian, H. Zheng, K. Zhao et al., Genomic characterization of emergent pseudorabies virus in China reveals marked sequence divergence: evidence for the existence of two major genotypes. Virology 483, 32–43 (2015). doi:10.1016/j.virol.2015.04.013
X. Zhang, J. Liu, C. Wei, A. Dai, X. Li et al., Cloning and sequences analysis of gB and gD gene of porcine pseudorabies virus Fujian strain. China Anim. Husb. Vet. Med. 41(5), 62–65 (2014). (in Chinese)
J.F. Kreuze, A. Perez, M. Untiveros, D. Quispe, S. Fuentes et al., Complete viral genome sequence and discovery of novel viruses by deep sequencing of small RNAs: a generic method for diagnosis, discovery and sequencing of viruses. Virology 388, 1–7 (2009)
P. Oláh, D. Tombácz, N. Póka, Z. Csabai, I. Prazsák et al., Characterization of pseudorabies virus transcriptome by Illumina sequencing. BMC Microbiol. 15, 130 (2015). doi:10.1186/s12866-015-0470-0
E. Sozzi, A. Moreno, D. Lelli, S. Cinotti, G.L. Alborali et al., Genomic characterization of pseudorabies virus strains isolated in Italy. Transbound. Emerg. Dis. 61(4), 334–340 (2014). doi:10.1111/tbed.12038
M.L. Szpara, Y.R. Tafuri, L. Parsons, S.R. Shamim, K.J. Verstrepen et al., A wide extent of inter-strain diversity in virulent and vaccine strains of Alphaherpesviruses. PLoS Pathog. 7(10), e1002282 (2011). doi:10.1371/journal.ppat.1002282
S. Xiang, Z. Zhou, X. Hu, Y. Li, C. Zhang et al., Complete genome sequence of a variant pseudorabies virus strain isolated in central China. Genome Announc. 4(2), 1–2 (2016). doi:10.1128/genomeA.00149-16
T.C. Mettenleiter, Immunobiology of pseudorabies (Aujeszky’s disease). Vet. Immunol. Immunopathol. 54, 221–229 (1996)
K. Tamura, J. Dudley, M. Nei, S. Kumar, MEGA4: molecular evolutionary genetics analysis (MEGA) software version 4.0. Mol. Biol. Evol. 24, 1596–1599 (2007)
F. Rozas, R. Rozas, DnaSP version 3.0: an integrated program for molecular population genetics and molecular evolution analysis. Bioinformatics 15, 174–175 (1999)
X. Yu, Z. Zhou, D. Hu, Q. Zhang, T. Han et al., Pathogenic pseudorabies virus, China, 2012. Emerg. Infect. Dis. 20(1), 102–104 (2014). doi:10.3201/eid2001.130531
Acknowledgements
The work was jointly supported by Applied Basic Research Key Project of Yunnan (Grant No. 2016FA018) and Key Laboratory of Veterinary Public Health of Higher Education of Yunnan Province.
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G.F.Y. and X.H.S. conceived and designed the study. W.B.B. and X.Q.Z. collected the samples. C.L.S. and L.G. carried out the experiments. C.L.S., G.F.Y. and X.H.S. drafted the manuscript. All authors read and approved the final manuscript.
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Edited by Zhen F. Fu.
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Song, C., Gao, L., Bai, W. et al. Molecular epidemiology of pseudorabies virus in Yunnan and the sequence analysis of its gD gene. Virus Genes 53, 392–399 (2017). https://doi.org/10.1007/s11262-017-1429-z
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DOI: https://doi.org/10.1007/s11262-017-1429-z