The porcine parvovirus(PPV)HZ-9 strain isolated in the study was purified from infected porkling kidney cell cultures by high speed centrifugation with polyethylene glycol precipitation and CsCL quilibrirm density centrifugation.

• 将自行分离鉴定的猪细小病毒 HZ-9株感染仔猪肾原代细胞,采用 PEG 沉淀法及 CsCl密度梯度离心从病毒细胞培养物中提纯病莓。