摘要：目的 探讨经母亲对胎儿行被动免疫在预防乙型肝炎病毒(HBV)宫内感染中的作用.方法 对自孕20周起多次肌肉注射乙肝免疫球蛋白(HBIG)的乙肝表面抗原(HBsAg)(+)孕妇68例(A组)及未注射的28例HBsAg(+)孕妇(B组)采用固相放免法和套式PCR检测母血HBsAg、HBV DNA及其新生儿血HBsAg、抗HBS、HBV DNA.结果 A组70例新生儿中64例血清抗HBS(+),与B组相比差异有统计学意义(P＜0.05).A组新生儿血HBsAg、HBV DNA检出率均明显低于B组.A组孕妇用药后血HBsAg滴度及HBVDNA水平较用药前明显下降.结论 经母亲对胎儿行被动免疫可有效预防HBV宫内感染. Abstract： Objective To investigate the effect of passive immunization of fetus by infection of mother with HBIG on drevention of HBV intrauterine infection. Methods Forty-eight pregnant women with HBsAg positive were divided into two groups:group A(68 cases)were injected with HBIG during pregnancy;group B(28 cases)were followed up without injecfion of HBIG as controls. The blood samples of mothers and their infants were tested with radioimmunoassay and PCR. Results of 70 infants in group A,64(91.46%)were positive for anti-HBs(P＜0.05).The infants with HbsAg positive and HBV DNA positive in group A were fewer than those in group B(P=0.02 and ＜0.05). Conclusions Passive immunization of fetus by iniection to mother with HBsAg may prevent HBV intrauterine infection effectively.

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