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. 2021 Nov 2;8:742345. doi: 10.3389/fvets.2021.742345

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Copyright © 2021 Aradanas, Poljak, Fittipaldi, Ricker and Farzan.

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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Virulence-associated factor gene distribution among isolates in SC, NSC, NSP, and NSH groups. Darker shades show a higher proportion of isolates of a serotype carrying a particular gene. White indicates an absence of gene in that serotype. (A) Isolates recovered from systemic sites of pigs with confirmed infections (SC), (B) isolates recovered from non-systemic sites of pigs with confirmed infections (NSC), (C) isolates recovered from probable cases (NSP), and (D) isolates recovered from non-systemic sites of healthy pigs (NSH).