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作者选择了美国5个县的全部肝炎病人的血清标本和流行病学资料,以期证实美国甲型、乙型和非甲非乙型肝炎的发病情况。急性期血清标本中 IgM 抗-HAV 阳性者诊断为甲型肝炎;HBsAg 或抗-HBc(IgM 型占优势)阳性者诊断为乙型肝炎;HBsAg 阳性和 IgM 抗-HAV 阳性者诊断为 HBsAg 携带者伴发急性甲型肝炎;无任何急性甲型和乙型肝炎血清学标记而有黄疸、谷丙转氨酶或谷草转氨酶≥100IU,又无其他确定的肝病原因者诊断为非甲非乙型肝炎。5个县在13～20个月期间共报告了3,749个肝炎病
The authors selected serum samples and epidemiological data from all patients with hepatitis in five counties in the United States to confirm the incidence of Type A, B and non-A non-B hepatitis in the United States. Patients with positive IgM anti-HAV in acute serum specimens were diagnosed with Hepatitis A; those with HBsAg or anti-HBc (IgM dominant) were diagnosed with Hepatitis B. HBsAg-positive and IgM anti-HAV were diagnosed as HBsAg carriers Accompanied with acute hepatitis A; without any acute hepatitis A and B serological markers and jaundice, alanine aminotransferase or aspartate aminotransferase ≥ 100IU, no other identified causes of liver disease were diagnosed as non-A, non-B hepatitis. In 5 counties, a total of 3,749 hepatitis diseases were reported during the 13-20 months