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. 2023 May 31;14:1186322. doi: 10.3389/fmicb.2023.1186322

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Copyright © 2023 Li, Li, Guo, Xu, Gong, Sun, Zhao, Xiang, Leng, Peng, Zhou, Tang, Liu, An, Cai, Tian, Wang and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The deduced NSP2 amino acid sequences of the new-branch strains compared with the reference PRRSV strains. The position of the deduced Nsp2 amino acid sequence relative to the VR-2332 strain. Purple indicates the common aa deletion of intermediate PRRSV, new-branch PRRSV and HP-PRRSV. Red indicates the deletion pattern of HP-PRRSV; green indicates the novel characteristic discontinuous deletion pattern of new-branch PRRSV; yellow indicates the deletion pattern of NADC30 PRRSV (not fully displayed); cyan indicates other deletion patterns of intermediate PRRSV strains. The new-branch PRRSV strains obtained in this study are labeled with red triangles (▲). The strains obtained from GenBank belonging to the new branch are marked with blue squares (■).