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. 2022 Jun 14;9:884733. doi: 10.3389/fvets.2022.884733

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Copyright © 2022 Cheng, Campler, Schroeder, Yang, Mor, Ferreira and Arruda.

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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Porcine reproductive and respiratory syndrome virus (PRRSV) ORF5 phylogenetic consensus tree constructed using the maximum likelihood method with bootstrap resampling. Sequences from processing fluids (n = 34) of three breeding farms (Farm 1, 2, and 3), oral fluids (n = 7) of two growing farms (Farm 4 and 5), tonsil scraping (n = 12) of all recruited farms (Farms 1–5), 690 previously reported lineage anchors, and five PRRSV vaccine strains, were classified and compared. Sequences that are highly clustered are labeled only once due to the space limitation.