“…Aujeszky's disease is caused by the Pseudorabies virus (PRV) (Mettenleiter, 2000) with domestic pigs and wild boar as principal hosts (Christensen et al, 1993;Ruiz-Fons et al, 2008). Outbreaks have occurred in countries including Denmark, Germany, Ireland, Poland, the United Kingdom, and the United States (Christensen et al, 1993;Gloster et al, 1984;Henderson et al, 1995;Müller et al, 2003;Obaldía, 2005;Salwa, 2004;Scheidt et al, 1991).…”