Abstract
Equine coital exanthema (ECE) caused by equid herpesvirus 3 (EHV-3) is a contagious venereal disease characterised by the formation of painful papules, vesicles, pustules and ulcers on the external genitalia of both mares and stallions. EHV-3 is an alphaherpesvirus that is distinct from the other equine herpesviruses and endemic in most horse breeding populations worldwide. The negative impacts of ECE on equine breeding enterprises are the forced, temporary disruption of mating activities of mares and stallions, the additional care and supportive treatment that is required for affected horses, and the risk of virus spread by either fresh or frozen semen as well as by artificial insemination and embryo transfer. Because there are no effective surveillance systems to report ECE, its true prevalence and economic impact are difficult to assess and are probably underestimated.The purpose of this review is to describe the recent advances in understanding of EHV-3 infections and to consider the economic consequences of ECE within the current context of the equine industry.
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