禽流感病毒的致病性研究进展

禽流感严重威胁人类健康和生命安全,危害养禽业,造成巨大经济损失,而且目前出现了多种亚型禽流感病毒(avian influenza virus,AIV)共存的局面。疫苗接种仍是当前预防禽流感的重要手段。单一亚型的HA、NA抗原甚至不能对相同亚型的毒株产生很好的免疫保护作用。因此,研究和开发广谱、高效、毒力低的多价疫苗(Polyvalent Vac-cine)是禽流感疫苗发展的方向。然而随着病毒的毒力逐年增强及抗原的频繁变异,在疫苗株的选育上显得愈加艰难;又由于多价疫苗的相互干扰作用,会造成免疫原性降低或毒力增强等。因此,研制广谱、高效、低毒的疫苗一直是困扰人们的一个难题。其中,DNA疫苗被认为是防制禽流感最具潜力的基因工程疫苗之一。

The Progress of the Study in the Pathogenic of Avian Influenza Virus

Avian influenza(AI) has caused enormous economic loss and grand challenges for the public health.Further more,there is new situation that many subtypes avian influenza viruses(AIV) are coexistent.Vaccines are still the main means to prevent AI.But traditional vaccines can't play a efficient role to prevent the AI for the characteristic of AIV for the variation and more subtypes.So it's an important question to design and study new vaccines,especially polyvalent vaccines.DNA vaccines have been the subjects o...