Systematic Veterinary Virology

CONTROL AND ERADICATION

• Vaccines
• Attenuated and inactivated vaccines have been developed. Vaccines protect pigs from clinical disease, reduce the amount and duration of virus excretion, but do not prevent latent infections. Virus can still be transmitted from vaccinated animals to susceptible contacts. Vaccines have also been made from genetically modified virus. These viruses have a variety of nonessential proteins missing from their genome.
• Eradication
• Strict biosecurity measures, purchase of pigs from PR free herds, movement control and prevention of entry of dogs, cats and rodents into the pig house will prevent the infection. When pseudorabies occurs on a farm, the premises should be quarantined, and all movement of people and animals should be strictly controlled. If possible, healthy pigs should be separated from the sick and movement between them should be strictly controlled.
• Dead pigs should be disposed by a deep burial or incineration. Recovered pigs should be sold only for slaughter to prevent spreading infection to other farms by carrier swine. Many herds which are infected may be freed of infection by using either "test and removal" procedures or offspring segregation. In highly concentrated operations, the virus appears to cycle intermittently, and many offspring with isolation and removal of infected animals appears to be an effective herd cleanup strategy.