Swine was the natural host and reservoir of PrV, which inflicts major economic loss in pig industies worldwide.Immunization with safe, effective vaccine is main measurements to prevent the disease.

• 猪是本病病毒的天然宿主和贮存者，本病可引起猪严重的繁殖障碍，给我国乃至全世界的养猪业造成巨大经济损失。