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应用酶联的方法检测小儿急性乙肝、慢性乙肝、ＨＢｓＡｇ携带者血清的ＨＤＡｇ和抗－ＨＤ共３４０例。检测结果，小儿乙肝患者中丁型肝炎病毒（ＨＤＶ）总感染率为９．１％。其中慢性乙肝感染率为１４．４％，急性乙肝感染率为３．２％，ＨＢｓＡｇ携带者感染率为６．８％。乙肝患儿病程＜１年者ＨＤＶ感染率为５．９％，病程≥１年者ＨＤＶ感染率为１５．５％，二者有极显著性差异（Ｐ＜０．０１）。本文提示北京地区小儿乙肝患者及ＨＢｓＡｇ携带者存在着ＨＤＶ感染，感染率的高低与临床类型和患儿病程长短有关。
Enzyme linked method was used to detect 340 cases of HDAg and anti-HD in children with acute hepatitis B, chronic hepatitis B and HBsAg carriers. Test results, hepatitis B patients with hepatitis D virus (HDV) total infection rate was 9.1%. Among them, chronic hepatitis B infection rate was 14.4%, acute hepatitis B infection rate was 3.2%, HBsAg carrier infection rate was 6.8%. The prevalence of HDV infection was 5.9% in patients with hepatitis B within 1 year and 15.5% after 1 year of disease. There was a significant difference between the two (P <0.01). This paper suggests that there is HDV infection in pediatric hepatitis B patients and HBsAg carriers in Beijing. The infection rate is related to the clinical type and duration of disease in children.