Self-declaration by New Zealand of freedom from infection with equine arteritis virus

摘要

Equine arteritis virus (EAV) was ?rst determined to be present in horses in New Zealand in 1988. The release of the virus was considered to have occurred from horses imported from North America. A serological survey carried out in 1989 showed that the virus had been circulating widely in the standardbred sector with 54% (95% con?dence interval [CI], 45–63%) of standardbreds testing serologically positive. A low level of seropositivity was also detected in the thoroughbreds, with 3% testing positive using the virus neutralisation test (VNT) to antibody for EAV.