摘要
Abstract
Objective To study the effect of different delivery modes on immunoprophylaxis efficacy so as to clarify whether or not cesarean section reduces immunoprophylaxis failure.Methods Mothers with positive hepatitis B surface antigen (HBsAg) were selected in the t hird trimester of pregnancy. Their babies were inoculated with hepatitis B immu noglobulin at birth and hepatitis B vaccine at 1, 2 and 7 months of age. HBsAg and its antibodies (anti-HBs) were tested at 1, 4, 7, and 12 months of age, then followed up yearly.Results A total of 301 babies entered the study, including 144 born by normal spontaneous vaginal delivery, 40 by obstetric forceps or vacuum extraction, and 117 byces arean section. The incidence of mother's HBeAg positivity or baby's gender cons titution was comparable between the three groups. There were no significant dif ferences in the positive rate of anti-HBs or HBsAg at follow-up periods among the three groups. At 12 months of age, anti-HBs could be detected in 78.9% of the babies born by normal vaginal delivery, 84.6% of the babies by forceps or vacuum extraction, and 86.4% of the babies by cesarean section. The positive r ate of HBsAg was 8.1%, 7.7%, 9.7%, and chronic HBV infection incidence was 7 .3%, 7.7%, 6.8% respectively.Conclusions There are no significant effects of delivery mode on the interruption of HBV mat ernal-baby transmission by immunoprophylaxis. Cesarean section does not reduce the incidence of immunoprophylaxis failure.关键词
垂直传播/乙型肝炎病毒/剖宫产Key words
vertical disease transmission/hepatitis B vir us/cesarean section
分类
医药卫生
