Our investigation was conducted in order to verify a recent severe epidemic at several swine farms in northern China that indicated a newly emerging disease. Evidence confirmed that the epidemic was caused by a virulent Pseudorabies virus infection in swine herds.
Animals ; China/epidemiology ; Enzyme-Linked Immunosorbent Assay/veterinary ; Epidemics/*veterinary ; Herpesvirus 1, Suid/classification/*isolation & purification/*pathogenicity ; Pseudorabies/*epidemiology/mortality/pathology/virology ; Reverse Transcriptase Polymerase Chain Reaction/veterinary ; Sequence Analysis, DNA/veterinary ; Swine ; Swine Diseases/*epidemiology/mortality/pathology/virology ; Vaccination/adverse effects/veterinary ; Virulence