乙型肝炎基因工程疫苗母婴阻断及儿童免疫效果

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将76例HBsAg和HBeAg双阳性母亲所生新生儿随机分为A、B两组,分别接种3针20μg基因疫苗和1针HBIG加3针10μg基因疫苗。将239名乙肝易感学龄儿童(7~9岁)随机分为3组,Ⅰ组接种3针10μg基因疫苗,Ⅱ组接种3针5μg基因疫苗,Ⅲ组接种3针10μg血源疫苗。接种程序和接种部位均按"北京市乙肝疫苗免疫接种规程"进行,并于初次免疫后7个月、12个月和24个月采血检测HBsAg、抗-HBs和抗-HBc。结果表明,①新生儿免疫保护率:T24时A、B两组分别为80.92%和96.97%;用Fisher精确x2检验P<0.05,两组间差异有显著性;②新生儿免疫后抗体应答:T24时A、B两组的抗-HBs阳转率分别为70.27%和94.74%,GMT(mIU/ml,下同)分别为494和388,经统计学分析,两组间抗体阳转率差异有显著性,表明,HBIG加3针10μg基因疫苗联合使用效果优于单用3针20μg疫苗组;③学龄儿童3组的抗-HBs阳转率:在T7、T12时均在96%以上,各组间未见显著性差异。在T24时,3组的抗-HBs阳转率分别为98.65%、97.40%和98.63%,GMT为1062、533和7? Sixty-six newborn infants born from HBsAg and HBeAg positive mothers were randomly divided into A and B groups and inoculated with 3 doses of 20 μg gene vaccine and 1 dose of HBIG plus 3 doses of 10 μg of gene vaccine respectively. A total of 239 hepatitis B susceptible school-aged children (7-9 years old) were randomly divided into three groups: group I received 3 doses of 10μg gene vaccine, group Ⅱ received 3 doses of 5μg gene vaccine, and group Ⅲ received 3 doses of 10μg blood vaccine. Inoculation procedures and vaccination sites were conducted according to the “Beijing Hepatitis B Vaccine Immunization Protocol” and HBsAg, anti-HBs and anti-HBc were collected at 7, 12 and 24 months after the initial immunization. The results showed that: (1) The rate of neonatal immunization was 80.92% and 96.97% respectively in A and B groups at T24, P <0.05 by Fisher’s exact x2 test, and there was significant difference between the two groups Antibody response in children after immunization: The positive rate of anti-HBs in A and B groups was 70.27% and 94.74% at T24, respectively, and 494 and 388 respectively in GMT (mIU / ml, the same below) Analysis showed that there was a significant difference in antibody positive rate between the two groups, indicating that HBIG combined with 3-pin 10μg gene vaccine was superior to the single-dose 3μg 20μg vaccine group. ③ The positive rate of anti-HBs in school-age children was T7, T12 were more than 96%, no significant differences between groups. At T24, the anti-HBs positive rates in the three groups were 98.65%, 97.40% and 98.63%, respectively, with GMTs of 1062, 533 and 7%
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