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引言血液中乙型肝炎表面抗原(HBsAg)持续阳性,表明存在乙型肝炎病毒的慢性感染。而某些无症状 HBsAg 携带者的肝脏损害与慢性活动性肝炎的病变一致。在美国有近10%的急性黄疸型乙型肝炎住院病人可变成慢性感染。据调查表明,全世界人群中均散在乙型肝炎病毒感染,美国的供血者有0.05~0.5%的人为 HBsAg 携带者,而在某些发展中国家则有5~15%的人群携带 HBsAg。目前世界上估计有1~2亿
Introduction Hepatitis B surface antigen (HBsAg) persistently positive in the blood, indicating the presence of chronic hepatitis B virus infection. Some asymptomatic HBsAg carriers of liver damage and chronic active hepatitis lesions consistent. Nearly 10% of patients with acute jaundice hepatitis B in the United States can become chronically infected. According to the survey, hepatitis B virus infection is scattered throughout the world, with 0.05 to 0.5% human HBsAg carriers in the United States, and 5 to 15% of people carrying HBsAg in some developing countries. There are currently estimated 1 to 200 million in the world