Aujeszky’s disease (AD) or pseudorabies (PR), also referred as “mad itch,” is a highly contagious, economically significant disease of pigs caused by suid herpesvirus 1 (SHV-1). ADV can infect a wide range of mammals and birds, but it is considered as non-pathogenic for human. In non-porcine species, ADV infection resulting in fatal encephalitis is often associated with pruritus. In members of Suidae family (true pigs), the disease is characterised by central nervous system, respiratory system or reproductive system disorders that vary among different age groups. The important property of ADV is its ability to establish latency in pigs that survive an acute infection.