Why the study?
Porcine circovirus 2 was historically the only species associated with porcine circovirus-associated disease syndromes.
PCV3 is identified as a putative cause of reproductive failure, encephalitis, myocarditis, and other syndromes in the US swine herd.
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New circovirus species linked to PCVAD; leaves open questions on causality and clinical relevance pending prospective data.
Arruda et al. (2019) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: