儿童对乙型肝炎疫苗加强接种的免疫应答

观察了经乙型肝炎疫苗初免的38名儿童对乙型肝炎疫苗加强接种的免疫效果。疫苗加强接种后97.4%(37/38)儿童产生了免疫应答,接种后3周、3月及6月的抗-HBs水平由接种前的33.6IU/L,分别增至824.1、407.7及193.6IU/L,平均增高24.5、12.1和5.8倍,加强接种后3周抗-HBs水平达到高峰,3月及6月时抗-HBs水平比3周时分别下降50.5%和76.5%。加强免疫的应答效果主要由初免的免疫应答状态所决定。本文显示,儿童用10μg乙型肝炎疫苗加强接种能获得良好的免疫应答效果。

Immune Response to Hepatitis B Revaccination in Children

In this report, we investigated the efficacy of revaccination with hepatitis B vaccine in thirty-eight children after primary immunization. The results showed that anti-HBs immune response developed in 37 children after revaccination. with a response rate of 97.4% (37/38). The geometric mean titres (GMTs) of anti-HBs at 3rd weeks, 3rd and 6th month after the booster dose reached 824.1, 407.7 and 193.6IU/L, which were 24.5, 12.1 and 5.8 times higher than those before the booster dose (33.6IU/L), respectively. The peak levels reached at 3rd week after revaccination. However anti-HBs levels declined rapidly, the percentage of antibody decrease were 50.5%, 76.5% at 3rd and 6th month after booster dose respectively. The immune response to revaccination gave a strong correlation to the primary immunization. In conclusion, our findings indicated that a good response to revaccination with a dose of 10 micrograms of hepatitis B vaccine in children were observed.