Additional file 1: of Spatiotemporal trends in the discovery of new swine infectious agents

Characteristics of the new swine infectious agents. Disc: type of discovery (1: infectious agent species that was unknown before its discovery in pigs, 2: novel variant(s) from an infectious agent species known to infect pigs, 3: first infection of pigs by an infectious agent species known to infect other host species), Cont: context of discovery (1: infectious agent screening or research activities, 2: outbreak investigation), Host range (1: swine-specific, 2: infect other animal species, 3: host range includes humans), *: Only rotavirus variants classified according to the nucleotide-sequence-based classification system, and recognised by the Rotavirus Classification Working Group are considered. The list of references is available upon request to the authors.