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. 2017 Jul 30;65(1):e83–e93. doi: 10.1111/tbed.12681

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© 2017 Blackwell Verlag GmbH

This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.

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Phylogenetic tree based on the nucleotide sequences of the entire S genes of 25 Vietnamese PEDV strains isolated in this study and other reference strains identified worldwide. The tree was constructed by the maximum likelihood method using the Tamura–Nei substitution model with a discrete gamma distribution in the MEGA v.6.05 program. Numbers at nodes represent the percentages of 1,000 bootstrap replicates (values <50 are not shown). The scale bar indicates the number of nucleotide substitutions per site. The Vietnamese PEDV strains evaluated in this study are marked by solid diamond symbols, and vaccine strains are marked by solid square symbols