Effective removal of equine arteritis virus from stallion semen.

The research article discusses the successful implementation of a double semen processing technique to effectively remove and prevent the transmission of equine arteritis virus (EAV) from stallion semen used in artificial insemination.

Objective

The purpose of the study was to determine if a double processing technique could extract EAV from stallion semen. Given the urgency to control the spread of EAV via artificial insemination, the researchers analyzed the effectiveness of a two-step procedure involving density gradient centrifugation and a ‘swim-up’ process.

Methods

• The team began by extracting aliquots from an uninfected stallion’s ejaculate, which they infused with the virus before processing it through the double technique procedure.
• They evaluated the resultant sperm preparations via PCR analysis to detect the presence of EAV.
• The researchers repeated the procedure using an ejaculate from a stallion known to be shedding EAV. They tested both the processed and unprocessed aliquots using PCR and virus isolation.

Results

The double semen processing technique successfully yielded virus-free sperm. In particular, the second step in the process, known as the ‘swim-up’, was instrumental in ensuring total virus removal.

Conclusions

According to the results, the double processing technique offers a promising and relatively simple solution for removing EAV from the semen of shedding stallions. By incorporating the density gradient centrifugation and ‘swim-up’ procedure in semen processing protocols for artificial insemination, it could significantly help in preventing the transmission of semen-borne viral diseases such as EAV.