According to its antigenlity and the difference of genetic compenets, there are two gene types or serum type for PCV, that is PCV-1 and PCV-2. PCV-1 has no pathgenocity and is common in cell lines and healthy pigs.

• PCV根据其抗原性及基因组成不同,分为2种基因型或称血清型,即PCV-1及PCV-2。