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孕妇将自己体内的传染病病原体(细菌或病毒等)通过一定的途径传染给胎儿或新生儿,这种情况称为垂直传播。乙型病毒性肝炎便是垂直传播的传染病。乙型肝炎表面抗原阳性的母亲所生婴儿,一年内乙型肝炎的感染率为51.8%～85.3%。e 抗原是决定母亲是否会将乙肝病原传染给婴儿的最重要因素,如 e 抗原滴度越高、脱氧核糖核酸聚合酶活性越大,婴儿的感染率也越大。科学家通过调查证明:大多数婴儿都是在分娩时受到感染的,这可能是由于母血通过胎盘渗入胎儿;或是母血感染婴儿创口表面或结膜;或者是在分娩时婴儿咽下母血或羊
Pregnant women in their body of infectious pathogens (bacteria or viruses, etc.) through a certain route of transmission to the fetus or newborn, this situation is called vertical transmission. Hepatitis B virus is a vertically transmitted infectious disease. Hepatitis B surface antigen-positive mothers born babies within a year of hepatitis B infection rate of 51.8% to 85.3%. e antigen is the most important factor that determines whether a mother will transmit the hepatitis B pathogen to a baby. For example, the higher the e antigen titer, the greater the DNA polymerase activity and the higher the infection rate in a baby. Investigations by scientists have shown that most babies are infected during childbirth, possibly because maternal blood penetrates the fetus through the placenta, maternal blood infect the baby’s wound surface or conjunctiva, or the baby swallows maternal blood at childbirth or sheep