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胎内感染的途径有三:①血行性胎盘胎儿感染;②上行性胎盘胎儿感染;③上行性羊水感染。在围产期胎内感染中最常见者为上行性羊水感染,即阴道内细菌上行感染羊水而导致胎内感染。上行性羊水感染必须通过颈管粘液、羊膜和羊水等屏障,另外不能说羊水感染即是胎内感染,还必须考虑胎儿对感染的防御能力,现就羊水的抗菌作用加以说明。一、羊水的抗菌作用一般认为新鲜羊水是无菌的,但Har-wick等经羊膜腔穿刺,将采取的羊水进行细菌培养,发现50例羊水标本中,6例有细菌生长。另外,Prenedourakis等在140例
There are three ways of intrauterine infection: ① blood placental fetal infection; ② fetal placental infection; ③ upstream amniotic fluid infection. Perinatal fetal infection in the most common ascending amniotic fluid infection, that the vaginal bacterial uptake of amniotic fluid caused by fetal infection. Upstream amniotic fluid infection must go through the neck mucus, amniotic membrane and amniotic fluid barrier, the other can not be said that amniotic fluid infection is intra-fetal infection, but also must consider the fetus’s ability to prevent infection, the antibacterial effect of amniotic fluid is now described. First, the antibacterial effect of amniotic fluid Generally believed that fresh amniotic fluid is sterile, but Har-wick by amniocentesis, amniotic fluid taken for bacterial culture, found in 50 cases of amniotic fluid specimens, 6 cases of bacterial growth. In addition, Prenedourakis et al in 140 cases