Figure 4From: Clinical observations and management of a severe equine herpesvirus type 1 outbreak with abortion and encephalomyelitisChanges in EHV-1 and EHV-4 antibody titers of serum samples collected on days 12 and 28 after the index case. A ≥ 4-fold increase in antibody titer is considered a significant rise. A simultaneous and significant increase of EHV-1 and EHV-4 antibodies was detected in 9 horses.Back to article page