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1989年9月27日至30日在东京日本大学召开了国际非甲非乙及丁型肝炎学术讨论会,予会者来自美国、法国、日本、苏联、印度、中国等从事非甲非乙肝炎研究的著名学者.非甲非乙肝炎是在甲、乙型肝炎特异性诊断方法建立之后发现的,依其传播途径及临床特征可区分为流行性非甲非乙和输血后非甲非乙肝炎,1987年WHO专家委员会把流行性非甲非乙称肠道传播的非甲非乙(E-NANB),把输血后NANB称肠道外传播型非甲非乙(P-NANB)。由于NANB基因克隆的研究进展,证明在基因水平上是不同的两个病毒.专家们把P-NANB称为HCV,把E-NANB称为HEV,故病毒性肝炎可分为A、B、C、D、E5型,它们之间是完全无抗原性联系的。
A non-A, B, and D hepatitis symposium was held at Japan’s Nihon University, Tokyo, from September 27 to September 30, 1989, with participants from the United States, France, Japan, the Soviet Union, India, China and other countries engaged in non- Non-A non-hepatitis B is found after the establishment of a specific diagnostic method for hepatitis A and B, which can be distinguished into non-A non-B and non-A non-B hepatitis after transfusion based on the route of transmission and clinical features In 1987, the WHO Expert Committee referred to the non-A non-B-form (E-NANB) that transmitted non-A / B as intestinal tract and the P-NANB as extranastral form for post-transfusion NANB. Because of the research progress of NANB gene cloning, two viruses are proved to be different at the gene level.People know P-NANB as HCV and E-NANB as HEV, so viral hepatitis can be divided into A, B and C , D, E5 type, between them is completely non-antigenic contact.