成人接种重组酵母乙型肝炎疫苗免疫效果观察

目的：探讨重组酵母乙型肝炎（乙肝）疫苗（YDV）对厉人的免疫效果及其安全性,方法：在辽宁省北票市部分学校随机选择一般健康状况良好、乙肝表面抗原（HBsAg）、乙肝表面抗体（抗－HBs）及乙肝核心抗体（抗－HBc）三项指标均为阴性且体温正常的22－58岁的教师124名,按0、1、6个月程序,每次5μg/0.5ml接种国产重组酵母乙肝疫苗。结果：免疫后3、7、12和24个月时,抗－HBs阳转率分别为35．0％,83．3％,65．5％和32．7％,抗抗－HBs平均滴度分别为12．6、402．0、70．3和20．3mIU/ml;抗－HBs阳转率及其滴度均在7个月时达到高峰,以后又急剧下降,免疫后各月女性抗－HBs阳转率和滴度均高于男性;＜35岁组的抗体阳性率高于≥35岁组,但12个月时,二比较差异有显意义;免疫3d后未出现局部和全身不良反应。结论：重组酵母乙肝疫苗对成人具有良好的免疫原性和安全性,其抗－HBs持续时间有待进一步观察。

Immunogenicity and safety of recombinant yeast-derived hepatitis B vaccine in adults

OBJECTIVE: To study the immunogenicity and safety of recombinant yeast-derived hepatitis B vaccine (YDV) in adults. METHODS: One hundred and twenty-four healthy teachers aged 22 approximately 58 years with serum negative HBsAg, anti-HBs, anti-HBc and with normal temperature were randomly selected from Beipiao city, Liaoning province. All the subjects were immunized with 5 microg/0.5 ml of YDV made by Beijing Institute of Biologic Products, for three doses at an interval of one and six months, respectively. RESULTS: The positivity of serum anti-HBs was 35.0%, 83.3%, 65.5% and 32.7% with a geometric mean titre (GMT) of 12.6 mIU/ml, 402.0 mIU/ml, 70.3 mIU/ml and 20.3 mIU/ml, respectively, three, seven, 12 and 24 months after immunization. The positivity and GMT of serum anti-HBs appeared the highest seven months after immunization, then began to decrease sharply. The positivity and GMT of serum anti-HBs in women was higher than that in men either three, or seven, or 12, or 24 months after immunization. The positivity of serum anti-HBs in those of 35 years or over was lower than that less than 35 years, seven months after immunization, but no age difference could be found 12 months after immunization. No local or systematic adverse reactions were found in all the subjects within three days after immunization. CONCLUSION: The recombinant yeast-derived hepatitis B vaccine (YDV) is immunogenic and safe for adults, but the persistency of serum anti-HBs in after immunization should be followed-up further.