My stallion is EVA seropositive, can his semen be frozen?
Yes, his semen can still be frozen. If your stallion is seropositive it means that he has circulating antibodies against the equine arteritis virus, either from previous natural exposure or from vaccination. A blood test cannot distinguish between antibodies that have developed against the actual virus or as a result of the vaccine. Even if your stallion is seropositive as a result of actual exposure to the virus, he may not have retained the virus in his reproductive tract (not all stallions do). The important step is to determine if the stallion is a carrier stallion and actually shedding virus in his semen. This can be determined by submitting semen samples to a recognized laboratory for attempted virus isolation in the semen from 2 separate ejaculates. If the semen is negative for the virus then the stallion is not a carrier and can breed mares without any restrictions or precautions. If he is a carrier and is actively shedding virus in the semen then it can still be frozen and use
