Additional file 2: of Spatiotemporal trends in the discovery of new swine infectious agents

Infectious agent species for which new variants were identified in swine from 1985 to 2010. n: number of new variants; Sp: the species is swine-specific; Zoo: the species is zoonotic; Outbreak: number of new variants identified through outbreak investigation; PRRS: Porcine reproductive and respiratory syndrome; PED: Porcine Epidemic Diarrhea; Tt: Torque teno; SHB : Swine hepatitis B; enc.: encephalitis