Abstract
Bovine ephemeral fever virus (BEFV) can cause bovine ephemeral fever and is an economically important arbovirus of cattle. To expand the knowledge of the molecular epidemiology of BEFV in southern China, the complete surface glycoprotein G gene of BEFV was sequenced from samples collected in five restricted outbreaks from 2013 to 2017, namely 2013ZH, 2014HM, 2015GX, 11082-2016, and qy2017. It was noted that both 2014HM and 11082-2016 were detected in cattle regularly vaccinated with inactivated vaccine. Phylogenetic analysis demonstrated that all five strains grouped into cluster I. However, qy2017 was closer to the BEFV strains identified in Thailand, Japan, and Taiwan after 2000, while 2013ZH, 2014HM, 2015GX, and 11082-2016 were closer to the Chinese strains in 2011 and the Turkey strains in 2012. The analysis of antigenic sites indicated that several amino acid changes occurred between the five strains and the vaccine strain. Importantly, one novel amino acid mutation site was observed in the putative N-linked glycosylation sites of 2013ZH, 2014HM, 2015GX, and 11082-2016. Our study indicated novel genetic characteristics of the newly emerging BEFV strains in southern China and the necessity of updating the component of commercially available inactivated BEFV vaccines in China.
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Funding
This project was supported in part by the Guangdong Natural Science Foundation (2017A030310032), the Science and Technology Planning Project of Guangdong Province (2015B020203005), Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases (2017B030314142), Modern Agricultural Science and Technology Innovation Alliance of Guangdong Province (2018LM2150), Pearl River S and T Nova Program of Guangzhou (201610010073), The China Scholarship Council (201807630008).
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KJ carried out the studies and drafted the manuscript, XW, RJ, YZ, YD, PZ and GL carried out part of the studies, SL gave the polish to the language of the manuscript. All the authors read and approved the final paper.
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Kun, J., Rongrong, J., Xiangbin, W. et al. Genetic characterization of bovine ephemeral fever virus in southern China, 2013–2017. Virus Genes 56, 390–395 (2020). https://doi.org/10.1007/s11262-020-01740-w
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DOI: https://doi.org/10.1007/s11262-020-01740-w