Abstract
The growth and intensification of swine production observed in the last four decades led to the emergence and reemergence of swine viruses. Among the main viral agents, the Porcine circovirus (PCV) stand out. Currently, 4 circovirus species are described (PCV1, PCV2, PCV3 and PCV4). Among the problems generated by these viruses, reproductive failures are of great importance due to the eno…