Abstract
Pigs are crucial as food sources, biomedical models, and reservoirs of some zoonotic viruses, yet their comprehensive viral exposure history remains poorly understood. Here, we developed SwiVirScan, a T7 phage display-based serological platform containing 36,416 peptides derived from 140 known swine-associated viruses. Application of SwiVirScan to 127 field serum samples from adult breeding pigs revealed extensive and diverse antibody signatures: every sample recognized peptides assigned to multiple viruses, including viruses with reported zoonotic relevance or potential for cross-species transmission. Pairwise analysis identified enriched co-seropositivity patterns, including a robust association between porcine bufavirus (PBuV) and porcine circovirus 3 (PCV3), and uncovered distinct associations between seroreactivity to vaccine-targeted viruses and other viral exposures. These findings establish SwiVirScan as a high-throughput platform for mapping viral exposure histories in pig populations and prioritizing viral targets for focused surveillance and investigation.