Strain differences between wild boar and domestic pig SWPV suggest that the source of infection of healthy domestic piglets is persistently infected subclinical domestic pigs.22 In our study, however, the genomic sequence of the whole TK sequence of Saxony-Anhalt strains of domestic pigs clustered with the TK sequence of the wild boar and not with the sequence of the domestic pigs from Westphalia and Austria. The gene discussed is TKT; the disease is infection.