Seven strains of the virus were isolated from pig farms by the authors,These viruses were identified as PPV by hemagglutination and hemagglutination inhibition tests,by Immunoelectronic microscope technology,and by polymerase chain reaction.

• 通过血凝试验、血凝抑制试验、免疫电镜技术及聚合酶链式反应等试验对分离毒进行了鉴定，结果分离到病毒均为猪细小病毒。