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自从对献血员进行乙型肝炎表面抗原的筛选后,由输血引起的乙型肝炎传播的危险已基本上得到控制。然而乙型肝炎病毒依然在传播着肝炎。根据世界卫生组织国际协作研究的资料报导,全世界慢性携带 HBsAg 病毒者总计有1760万人,只是各国患者的比例不同。HBsAg 阳性率在美国只占0.5%不到,而在非洲和亚洲一些地区,却在10%以上。在 HBsAg高发病区,患原发性肝细胞癌者亦相当普遍,患者的人数很可能比一般居民中携带 HBsAg病毒的人要高得多。这种状况用病源学的观点看,乙型肝炎病毒显然就是引起发病的重要环
The risk of hepatitis B transmission from blood transfusions has been largely controlled since screening blood donors for hepatitis B surface antigen. However, the hepatitis B virus is still spreading hepatitis. According to WHO data from international collaborative research, there are a total of 17.6 million people with chronic hepatitis B virus carriers worldwide, except for the different proportions of patients in all countries. The positive rate of HBsAg in the United States only accounts for less than 0.5%, while in some parts of Africa and Asia, it is more than 10%. In patients with high incidence of HBsAg, patients with primary hepatocellular carcinoma are also quite common, the number of patients is likely to be much higher than the average resident carrying HBsAg virus. This situation with etiology point of view, hepatitis B virus is clearly the cause of the disease