Background: Three flaviviruses (equine pegivirus [EPgV]; Theiler's disease-associated virus [TDAV]; non-primate hepacivirus [NPHV]) and equine parvovirus (EqPV-H) are present in equine blood products; the TDAV, NPHV, and EqPV-H have been suggested as potential causes of serum hepatitis.
Objective: To determine the prevalence of these viruses in horses with equine serum hepatitis.
Animals: Eighteen horses diagnosed with serum hepatitis, enrolled from US referral hospitals.